RHESSI Science Nuggets
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Welcome to the [[RHESSI Science Nuggets]]: science notes from [[RHESSI]]. The following is a time-ordered list of the latest Nuggets added to the wiki. An [[:Category:Nugget|alphabetical list of wiki Nuggets]] is also available as well as [[:Category:RHESSI Nugget List|yearly lists]]. We welcome volunteer authors - please see our page of [[Help:For_Authors| help for authors]] | Welcome to the [[RHESSI Science Nuggets]]: science notes from [[RHESSI]]. The following is a time-ordered list of the latest Nuggets added to the wiki. An [[:Category:Nugget|alphabetical list of wiki Nuggets]] is also available as well as [[:Category:RHESSI Nugget List|yearly lists]]. We welcome volunteer authors - please see our page of [[Help:For_Authors| help for authors]] | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = Is there HOPE for Hyder flares... | ||
+ | |number = 468 | ||
+ | |first_author = Hugh HUDSON | ||
+ | |publish_date = 15 March 2024 | ||
+ | |description = Filament eruptions/Hyder flares/<i>disparitions brusques</i> may all show HOPE | ||
+ | |image=Icon468.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = Sun-as-a-star Analysis of the M8.7 Flare on 2022 October 2 Using H-alpha and EUV Spectra Taken by SMART/SDDI and SDO/EVE | ||
+ | |number = 467 | ||
+ | |first_author = Takato OTSU | ||
+ | |publish_date = 19 February 2024 | ||
+ | |description = Whole-Sun spectroscopic observations can readily detect ejecta | ||
+ | |image=Icon467.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = Unexpected Asymmetry in GeV Emission | ||
+ | |number = 466 | ||
+ | |first_author = Bruno ARSIOLI and Elena ORLANDO | ||
+ | |publish_date = 15 January 2024 | ||
+ | |description = The high-energy solar gamma radiation shows inexplicable but fascinating properties | ||
+ | |image=Icon466.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = When it rippled in one place and exploded in another | ||
+ | |number = 465 | ||
+ | |first_author = Ivan ZIMOVETS | ||
+ | |publish_date = 25 December 2023 | ||
+ | |description = Pulsations precede a flare, but seem unrelated | ||
+ | |image=Icon465.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = Solar flares: evaporation and simulation | ||
+ | |number = 464 | ||
+ | |first_author = Malcolm DRUETT | ||
+ | |publish_date = 18 December 2023 | ||
+ | |description = Fitting beam electrons into multi-dimensional models | ||
+ | |image=Icon464.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = Pre-impulsive and Impulsive Phases of the March 28, 2022 Sub-Terahertz Flare | ||
+ | |number = 463 | ||
+ | |first_author = Galina G. MOTORINA | ||
+ | |publish_date = 11 December 2023 | ||
+ | |description = A flare with an increasing sub-THz spectrum and sub-THZ precursor information | ||
+ | |image=Icon463.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = Coronal Bright Points | ||
+ | |number = 462 | ||
+ | |first_author = Daniel NÓBREGA-SIVERIO | ||
+ | |publish_date = 27 November 2023 | ||
+ | |description = Bright EUV rowel-like structures can result from null-point reconnection | ||
+ | |image=Icon462.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = Aurora-like Radio Emission from a Sunspot | ||
+ | |number = 461 | ||
+ | |first_author = Sijie YU | ||
+ | |publish_date = 20 November 2023 | ||
+ | |description = Maser action above a sunspot | ||
+ | |image=Icon461.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = Search for a Flare Anticipation Index (FAI) | ||
+ | |number = 460 | ||
+ | |first_author = Hugh HUDSON | ||
+ | |second_author = and Jim McTiernan | ||
+ | |publish_date = 13 November 2023 | ||
+ | |description = Quantifying flare precursors on a few-minute time scale | ||
+ | |image=Icon460.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = Bouncing motions of fast electrons using Nobeyama Radioheliograph | ||
+ | |number = 459 | ||
+ | |first_author = Keitarou MATSUMOTO | ||
+ | |publish_date = 6 November 2023 | ||
+ | |description = Solar evidence for conservation of second adiabatic invariant in particle motion | ||
+ | |image=Icon459.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = Impact of nanoflare heating in the lower solar atmosphere | ||
+ | |number = 458 | ||
+ | |first_author = Helle BAKKE | ||
+ | |publish_date = 30 October 2023 | ||
+ | |description = The behavior of nanoflare fast electrons in Bifrost models | ||
+ | |image=Icon458.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = Precise timing of flare footpoint sources from mid-infrared observations | ||
+ | |number = 457 | ||
+ | |first_author = Paulo SIMÕES et al. | ||
+ | |publish_date = 23 October 2023 | ||
+ | |description = Mid-IR observations at high spatial and high temporal resolution: Conjugacy | ||
+ | |image=Icon457.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = The Greatest GOES Flares | ||
+ | |number = 456 | ||
+ | |first_author = Hugh HUDSON | ||
+ | |second_author = and Ed CLIVER | ||
+ | |publish_date = 25 September 2023 | ||
+ | |description = The greatest GOES events, re-analyzed, fall short of expectations | ||
+ | |image=Icon456.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = Introducing SunSketcher | ||
+ | |number = 455 | ||
+ | |first_author = Hugh HUDSON | ||
+ | |second_author = and Gordon EMSLIE | ||
+ | |publish_date = 11 September 2023 | ||
+ | |description = Galloping towards roundup in the 2024 total solar eclipse | ||
+ | |image=Icon455.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = TeV Gamma rays from the Quiescent Sun | ||
+ | |number = 454 | ||
+ | |first_author = Mehr Un NISA | ||
+ | |second_author = and John BEACOM | ||
+ | |publish_date = 21 August 2023 | ||
+ | |description = Solar photons at unprecedented high energies | ||
+ | |image=Icon454.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = Temporal and Spatial Characteristics of Hard X-Ray Sources in Flare Model with Vertical Current Sheet | ||
+ | |number = 453 | ||
+ | |first_author = Alexander SHABALIN, Eugenia OVCHINNIKOVA, | ||
+ | |second_author = and Yuri CHARIKOV | ||
+ | |publish_date = 7 August 2023 | ||
+ | |description = Modeling betatron acceleration in current-sheet development. | ||
+ | |image=Icon453.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = Spatial Distribution of Magnetic Reconnection Rate in an M6.5 Solar Flare | ||
+ | |number = 452 | ||
+ | |first_author = Ju JING | ||
+ | |publish_date = 12 June 2023 | ||
+ | |description = Linking hard X-rays to high-resolution images that show reconnection rates. | ||
+ | |image=Icon452.png}} | ||
+ | |||
+ | {{Nugget Badge | ||
+ | |title = Statistical study of Type III bursts and associated HXR emissions | ||
+ | |number = 451 | ||
+ | |first_author = Nicole VILMER and Tomin JAMES | ||
+ | |publish_date = 29 May 2023 | ||
+ | |description = Linking electron populations escaping from the Sun with those that RHESSI detects. | ||
+ | |image=Icon451.png}} | ||
{{Nugget Badge | {{Nugget Badge |
Latest revision as of 12:34, 26 April 2024
Welcome to the RHESSI Science Nuggets: science notes from RHESSI. The following is a time-ordered list of the latest Nuggets added to the wiki. An alphabetical list of wiki Nuggets is also available as well as yearly lists. We welcome volunteer authors - please see our page of help for authors
468 | Is there HOPE for Hyder flares... | |
15 March 2024 by Hugh HUDSON | ||
Filament eruptions/Hyder flares/disparitions brusques may all show HOPE. Click the title to read more. | ||
---|---|---|
467 | Sun-as-a-star Analysis of the M8.7 Flare on 2022 October 2 Using H-alpha and EUV Spectra Taken by SMART/SDDI and SDO/EVE | |
19 February 2024 by Takato OTSU | ||
Whole-Sun spectroscopic observations can readily detect ejecta. Click the title to read more. | ||
---|---|---|
466 | Unexpected Asymmetry in GeV Emission | |
15 January 2024 by Bruno ARSIOLI and Elena ORLANDO | ||
The high-energy solar gamma radiation shows inexplicable but fascinating properties. Click the title to read more. | ||
---|---|---|
465 | When it rippled in one place and exploded in another | |
25 December 2023 by Ivan ZIMOVETS | ||
Pulsations precede a flare, but seem unrelated. Click the title to read more. | ||
---|---|---|
464 | Solar flares: evaporation and simulation | |
18 December 2023 by Malcolm DRUETT | ||
Fitting beam electrons into multi-dimensional models. Click the title to read more. | ||
---|---|---|
463 | Pre-impulsive and Impulsive Phases of the March 28, 2022 Sub-Terahertz Flare | |
11 December 2023 by Galina G. MOTORINA | ||
A flare with an increasing sub-THz spectrum and sub-THZ precursor information. Click the title to read more. | ||
---|---|---|
462 | Coronal Bright Points | |
27 November 2023 by Daniel NÓBREGA-SIVERIO | ||
Bright EUV rowel-like structures can result from null-point reconnection. Click the title to read more. | ||
---|---|---|
461 | Aurora-like Radio Emission from a Sunspot | |
20 November 2023 by Sijie YU | ||
Maser action above a sunspot. Click the title to read more. | ||
---|---|---|
460 | Search for a Flare Anticipation Index (FAI) | |
13 November 2023 by Hugh HUDSON and Jim McTiernan | ||
Quantifying flare precursors on a few-minute time scale. Click the title to read more. | ||
---|---|---|
459 | Bouncing motions of fast electrons using Nobeyama Radioheliograph | |
6 November 2023 by Keitarou MATSUMOTO | ||
Solar evidence for conservation of second adiabatic invariant in particle motion. Click the title to read more. | ||
---|---|---|
458 | Impact of nanoflare heating in the lower solar atmosphere | |
30 October 2023 by Helle BAKKE | ||
The behavior of nanoflare fast electrons in Bifrost models. Click the title to read more. | ||
---|---|---|
457 | Precise timing of flare footpoint sources from mid-infrared observations | |
23 October 2023 by Paulo SIMÕES et al. | ||
Mid-IR observations at high spatial and high temporal resolution: Conjugacy. Click the title to read more. | ||
---|---|---|
456 | The Greatest GOES Flares | |
25 September 2023 by Hugh HUDSON and Ed CLIVER | ||
The greatest GOES events, re-analyzed, fall short of expectations. Click the title to read more. | ||
---|---|---|
455 | Introducing SunSketcher | |
11 September 2023 by Hugh HUDSON and Gordon EMSLIE | ||
Galloping towards roundup in the 2024 total solar eclipse. Click the title to read more. | ||
---|---|---|
454 | TeV Gamma rays from the Quiescent Sun | |
21 August 2023 by Mehr Un NISA and John BEACOM | ||
Solar photons at unprecedented high energies. Click the title to read more. | ||
---|---|---|
453 | Temporal and Spatial Characteristics of Hard X-Ray Sources in Flare Model with Vertical Current Sheet | |
7 August 2023 by Alexander SHABALIN, Eugenia OVCHINNIKOVA, and Yuri CHARIKOV | ||
Modeling betatron acceleration in current-sheet development.. Click the title to read more. | ||
---|---|---|
452 | Spatial Distribution of Magnetic Reconnection Rate in an M6.5 Solar Flare | |
12 June 2023 by Ju JING | ||
Linking hard X-rays to high-resolution images that show reconnection rates.. Click the title to read more. | ||
---|---|---|
451 | Statistical study of Type III bursts and associated HXR emissions | |
29 May 2023 by Nicole VILMER and Tomin JAMES | ||
Linking electron populations escaping from the Sun with those that RHESSI detects.. Click the title to read more. | ||
---|---|---|
450 | Solar flare hard X-rays from the anchor points of an eruptive filament | |
15 May 2023 by Muriel STIEFEL | ||
A rare "four-ribbon" flare has been detected in hard X-rays.. Click the title to read more. | ||
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449 | Did a Solar Flare Accelerate all the Ambient Electrons in the Coronal Acceleration Region?... | |
1 May 2023 by Gordon EMSLIE, Eduard KONTAR, Galina MOTORINA, and Brian DENNIS | ||
Considering SOL2017-09-10, probably not.. Click the title to read more. | ||
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448 | Diagnostics of Spatially-Extended Turbulent Acceleration and Transport | |
24 April 2023 by Morgan STORES | ||
Drilling down into the detailed structure of solar-flare energy release by including turbulence with particle acceleration.. Click the title to read more. | ||
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447 | RHESSI's Re-entry | |
17 April 2023 by Pascal SAINT-HILAIRE and Hugh HUDSON | ||
The final demise of RHESSI is this week. Click the title to read more. | ||
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446 | A Glasgow geomagnetic observation of a solar flare | |
13 March 2023 by Hugh HUDSON, John MALONE-LEIGH, Graham WOAN, and Chris OSBORNE | ||
Irish and Scottish geomagnetic observatories see a crochet much like that of the Carrington event. Click the title to read more. | ||
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{
445 | Particle Acceleration in Two Coronal Jets | |
27 February 2023 by Yixian ZHANG | ||
Coronal jets with hard X-ray sources at disjoint locations. Click the title to read more. | ||
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444 | The Curious First Sunquake of Solar Cycle 25 | |
13 February 2023 by Alexander KOSOVICHEV | ||
A double whammy: two distinct sunquakes from SOL2022-05-10.. Click the title to read more. | ||
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443 | Hard X-ray Pulsations via Gaussian Decomposition | |
30 January 2023 by Hannah COLLIER and Laura HAYES | ||
Flare hard X-ray time variations decomposed objectively. Click the title to read more. | ||
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442 | A possible coronal magnetic flare precursor | |
16 January 2023 by Enrico LANDI | ||
Novel measurements of the coronal magnetic field may help with flare prediction. Click the title to read more. | ||
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441 | A slow HOPE with microwave context | |
12 December 2022 by Hugh HUDSON | ||
A new microwave facility at Chashan Observatory, and a prototypical HOPE. Click the title to read more. | ||
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440 | Rapid variations of Si IV spectra in a flare observed by IRIS at a sub-second cadence | |
14 November 2022 by Juraj LÖRINČÍK | ||
Transition-region lines in a flare have a Doppler component revealing quasi-periodic pulsations. Click the title to read more. | ||
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439 | A Significant Sudden Ionospheric Disturbance Associated with a Massive Gamma-ray Burst | |
31 October 2022 by Laura HAYES and Peter GALLAGHER | ||
A first SID observed in broad daylight, from a source far far away. Click the title to read more. | ||
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438 | Effects of Coronal Structures on the Dynamics of the Global Coronal Wave of SOL2017-09-10 | |
17 October 2022 by Huidong HU, Ying D. LIU, and Bei ZHU | ||
The amazing global coronal wave of SOL2017-09-10 wrapped around the whole Sun, and displayed transmission and reflection at both polar coronal holes. Click the title to read more. | ||
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437 | KW-Sun: The Konus-Wind Solar Flare Database in Hard X-Ray and Soft Gamma-Ray Ranges | |
26 September 2022 by Alexandra LYSENKO | ||
An unrivaled hard X-ray and gamma-ray database is entering its third activity maximum. Click the title to read more. | ||
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436 | First Detection of Kink Oscillations with Solar Orbiter | |
19 September 2022 by Sihui ZHONG et al. | ||
SolO sees coronal oscillations as well as AIA can, and even better. Click the title to read more. | ||
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435 | Energetic Neutral Hydrogen from Large Solar Flares | |
6 September 2022 by Glenn MASON | ||
A rediscovered data treasury reveals the occurrence of many flare/CME events producing solar high-energy neutral atoms. Click the title to read more. | ||
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434 | Fifty-year Anniversary of the First Detection of Gamma rays from a Solar Flare | |
8 August 2022 by Jim Ryan, Brian Dennis, and Phil Dunphy | ||
The rich astrophysics of gamma-ray astronomy began with solar observations fifty years ago. Click the title to read more. | ||
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433 | Fast Prograde Flows in Solar Active Regions | |
25 July 2022 by Hugh HUDSON | ||
Unexpected, unpredicted, and not modeled yet - weird flows in hot active-region loops. Click the title to read more. | ||
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432 | Undetected Minority-polarity Flux, Moss, and Coronal Heating | |
11 July 2022 by Yi-Ming WANG | ||
There's plenty of room in "unipolar" active regions for both polarities, and there is good evidence for them. Click the title to read more. | ||
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431 | Thermal/Nonthermal with MinXSS and RHESSI | |
13 June 2022 by Shunsaku NAGASAWA | ||
Time-domain studies of improved X-ray spectra reveal a "super-hot' component. Click the title to read more. | ||
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430 | Sun-as-a-star spectroscopic observations of the line-of-sight velocity of a solar eruption on October 28, 2021 | |
30 May 2022 by Yu XU and Hui TIAN | ||
The observation of the full 3d velocity of a CME, for an anniversary event. Click the title to read more. | ||
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429 | Carl Størmer | |
15 April 2022 by Hugh HUDSON and Lyndsay FLETCHER | ||
Størmer and the theory of trapping in loops. Click the title to read more. | ||
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428 | Solar Hard X-rays with Insight | |
21 March 2022 by Wei WANG and Ping ZHANG | ||
A spectacular limb flare introduces Insight/HXMT, a new observational resource. Click the title to read more. | ||
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427 | Probing chromospheric current sheets using SST and ALMA co-observations | |
21 February 2022 by João da SILVA SANTOS | ||
Emerging magnetic flux appears in ALMA images reflecting coronal current sheets. Click the title to read more. | ||
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426 | A demonstration of STIX hard X-ray imaging spectroscopy capabilities for an X-class flare (SOL2021-10-28) | |
7 February 2022 by Andrea BATTAGLIA, Hannah COLLIER, and Säm KRUCKER | ||
STIX imaging of an X-class flare marks its success. Click the title to read more. | ||
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425 | A solar flare driven by thermal conduction observed in mid-infrared | |
24 January 2022 by Guillermo GIMÉNEZ de CASTRO | ||
Strong 10-micron emission from a GOES C2 flare suggests conductive heating. Click the title to read more. | ||
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424 | Disk Occultation of a Lopsided Sun | |
10 January 2022 by Hugh HUDSON, Stephen WHITE and Säm KRUCKER | ||
Observing a spotless Sun can enable observations of the faint corona.. Click the title to read more. | ||
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423 | Resolving two distinct thermal X-ray components in a compound solar flare | |
28 December 2021 by Zhenjun ZHOU and Rui LIU | ||
Superhot coronal sources may be independent loop systems. Click the title to read more. | ||
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422 | Bridging solar flares to coronal mass ejections | |
14 December 2021 by Markus ASCHWANDEN | ||
The Neupert effect allows us to trace coronal mass ejections seamlessly. Click the title to read more. | ||
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421 | The Jakimiec Diagnostic Diagram | |
29 November 2021 by Hugh HUDSON | ||
The joint variation of GOES temperature and emission measure discloses new features via an old tool. Click the title to read more. | ||
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420 | First look at ALMA/HInode/IRIS microflares | |
8 November 2021 by Toshifumi SHIMIZU et al. | ||
High-resolution ALMA and multiwavelength observations of microflaring. Click the title to read more. | ||
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419 | Thomson scattering near sunspots | |
25 October 2021 by Pascal Saint-Hilaire et al. | ||
Completing the modeling of low-coronal Thomson polarimetry. Click the title to read more. | ||
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418 | A Non-PFSS Global Coronal Model | |
11 October 2021 by Oliver RICE and Anthony YEATES | ||
Modeling as convenient as PFSS but much more realistic. Click the title to read more. | ||
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417 | Manifold Nonthermality | |
27 September 2021 by Marina BATTAGLIA et al. | ||
Even weak flares involve multiple sites of non thermal activity. Click the title to read more. | ||
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416 | X-Rays from a Type I Radio Burst | |
20 September 2021 by R. RAMESH | ||
A first identification of type I radio emission with hot plasma. Click the title to read more. | ||
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415 | Do Hot Onsets Predict Flare Magnitudes? | |
30 August 2021 by Hugh HUDSON | ||
Maybe we can tell how big a flare is going to be from its initial development.... Click the title to read more. | ||
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414 | Confined or Eruptive? | |
16 August 2021 by Ting LI et al. | ||
Increased magnetic flux reduces CME eruptivity. Click the title to read more. | ||
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413 | Impulsive and Gradual Eruptive Gamma Flares and Associated CMEs | |
19 July 2021 by Alexey STRUMINSKY, Irina GRIGORIEVA and Andrei SADOVSKI | ||
Extreme behavior of flare/CME events explained by environment. Click the title to read more. | ||
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412 | The Morphology of Flare Time Profiles | |
12 July 2021 by Larisa KASHAPOVA et al. | ||
Systematic comparison of solar and stellar flaring time profiles. Click the title to read more. | ||
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411 | Flare Pulsation and the Heliosphere | |
5 July 2021 by Brendan CLARKE et al. | ||
Flare pulsations link closely to the distant heliosphere. Click the title to read more. | ||
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410 | STIX, the Hard X-Ray Telescope on board Solar Orbiter | |
28 June 2021 by Andrea Francesco BATTAGLIA and Säm KRUCKER | ||
STIX is operational and producing great data. Click the title to read more. | ||
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409 | Nonequilibrium Ionization of Flare Plasma Observed by Hinode/EIS | |
14 June 2021 by Shinsuke IMADA | ||
Evidence for non-equilibrium ionization in the current sheet of SOL2017-09-10. Click the title to read more. | ||
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408 | Effects of Flares on Solar p-modes | |
26 April 2021 by Maria-Cristina RABELLO SOARES and Frederic BAUDIN | ||
No detectable p-mode amplitude changes due to solar flares. Click the title to read more. | ||
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407 | Subsecond Spikes in Solar Flare X-ray Flux as Seen by Fermi GBM | |
19 April 2021 by Trevor KNUTH and Lindsay GLESENER | ||
A new analysis technique pushes hard X-ray time scales to 0.1 sec or faster. Click the title to read more. | ||
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406 | Negative He 10830 Flare Ribbons and Non-thermal Electrons | |
12 April 2021 by Graham KERR | ||
A 1D radiation hydrodynamics model can explain the dark leading edges of He I flare ribbons. Click the title to read more. | ||
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405 | Tracing the sources of gradual solar energetic particle events | |
29 March 2021 by David H. BROOKS and Stephanie L. YARDLEY | ||
Chemical abundances in SEPs suggest an origin in flare-related moss regions. Click the title to read more. | ||
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404 | The Superflare SOL2017-09-06: from submm to mid-IR | |
15 March 2021 by Guillermo (Guigue) GIMÉNEZ DE CASTRO | ||
Glimpsing the "missing decades" of the flare emission spectrum. Click the title to read more. | ||
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403 | The Neupert Effect Revisited | |
8 March 2021 by Jiong QIU | ||
Two time scales for heating individual flare strands. Click the title to read more. | ||
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402 | FLUKA as a tool for interpreting flare gamma-rays | |
1 March 2021 by Alec MACKINNON | ||
The nuclear physics of solar flares captured in a detailed model. Click the title to read more. | ||
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401 | A Collective Study of 11 NuSTAR Microflares | |
22 February 2021 by Jessie DUNCAN and Lindsay GLESENER | ||
Swarms of NuSTAR micro flares. Click the title to read more. | ||
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{{
400 | A Solar FRB | |
15 February 2021 by Dale GARY and Hugh HUDSON | ||
A new frontier in the solar time domain. Click the title to read more. | ||
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399 | Richard Schwartz | |
25 January 2021 by Brian DENNIS and Hugh HUDSON | ||
Remembering a friend and colleague. Click the title to read more. | ||
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398 | Observing Solar Flare X-ray Polarization with Prospective CubeSat Missions | |
4 January 2021 by Natasha JEFFREY | ||
The polarization of the solar X-ray spectrum generally remains to be observed. Click the title to read more. | ||
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397 | Solar effects in the local interstellar medium | |
14 December 2020 by Don GURNETT and Hugh HUDSON | ||
Relativistic particle events observed _in situ_ in the interstellar medium. Click the title to read more. | ||
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396 | Investigation of Small-Scale Energy Releases in Hard X-rays with FOXSI | |
7 December 2020 by Subramania ATHIRAY and Juliana VIEVERING | ||
Hard X-rays and high temperatures from the feeblest microflares. Click the title to read more. | ||
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395 | What drives impulsive coronal heating? | |
30 November 2020 by Pradeep CHITTA et al. | ||
Impulsive footpoint emissions suggest magnetic reconnection in the chromosphere. Click the title to read more. | ||
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394 | Probing the solar coronal heating function with slow magnetoacoustic waves | |
16 November 2020 by Dmitrii KOLOTKOV et al. | ||
Coronal heating models meet damped slow magnetoacoustic waves. Click the title to read more. | ||
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393 | Self-Consistent Flare Model | |
2 November 2020 by Wenzhi RUAN and Rony KEPPENS | ||
Energy transport by fast particles made self-consistent with MHD flare modeling. Click the title to read more. | ||
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392 | Hot Flare Onsets | |
26 October 2020 by Hugh HUDSON et al. | ||
The initial soft X-ray temperatures of solar flares tend to be in the 10-15 MK range. Click the title to read more. | ||
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391 | Electric Current Neutralization and Eruption | |
19 October 2020 by Ellis AVALLONE and Xudong SUN | ||
Coronal currents without neutralizing return currents appear to. Click the title to read more. | ||
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390 | Prediction of Solar Cycle 25 | |
5 October 2020 by Leif SVALGAARD | ||
Now we know how big the next solar maximum will be. Click the title to read more. | ||
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389 | Flare/CME Cartoon Archive | |
27 September 2020 by Hugh HUDSON | ||
A new edition of the Flare/CME archive, nearly a half kilotoon now. Click the title to read more. | ||
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388 | Submerged Flare Acoustic Sources | |
13 September 2020 by Juan Camilo BUITRAGO CASAS and Angel MARTÍNEZ | ||
Flare acoustic radiation emanates from a source _inside_ the Sun. Click the title to read more. | ||
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387 | Circular Ribbon Flare at Microwaves | |
31 August 2020 by Jeongwoo LEE | ||
Breakout reconnection reveals itself via microwave polarization measurements.. Click the title to read more. | ||
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386 | Relation of Non-neutralized electric currents and the activity in active regions | |
24 August 2020 by P. VEMAREDDY | ||
Non-neutralized coronal current systems contribute to CME eruptions. Click the title to read more. | ||
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385 | White-light emission and photospheric magnetic field changes in flares | |
17 August 2020 by J. Sebastián CASTELLANOS DURÁN and Lucia KLEINT | ||
There are strong correlations between white-light flare emissions and line-of-sight magnetic field changes. Click the title to read more. | ||
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384 | Sunspot Differential Rotation in an X-class Flare | |
10 August 2020 by Richard GRIMES, Balázs PINTÉR and Huw MORGAN | ||
Observations suggesting how the coronal tail can wag the photospheric dog. Click the title to read more. | ||
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383 | Energy Partitioning in a Nonthermally Dominated Two-loop Solar Flare | |
3 August 2020 by Galina MOTORINA et al. | ||
Modeling the propagation of energy via GX Simulator in an early-impulsive flare. Click the title to read more. | ||
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382 | SOL2013-11-10 Eruptive Circular-ribbon Flare with Extended Remote Brightenings | |
31 July 2020 by Chang LIU et al. | ||
A circular-ribbon event can launch an eruption by breaking through its separatrix dome. Click the title to read more. | ||
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381 | Extreme-Ultraviolet Late Phase of Solar Flares | |
22 June 2020 by Rui LIU | ||
Both arcade and circular-ribbon flares may sometimes spawn EUV late phase emission. Click the title to read more. | ||
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380 | Energy transport by accelerated particles in the quiet solar atmosphere | |
15 June 2020 by Lars FROGNER, Boris GUDIKSEN and Helle BAKKE | ||
A first study of non-thermal particles integrated into an MHD simulation of the solar atmosphere. Click the title to read more. | ||
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379 | Quasi-periodic pulsations as indicators of oscillatory processes in solar flares | |
11 May 2020 by Elena KUPRIYANOVA et al. | ||
Many, many QPPs. Click the title to read more. | ||
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378 | Rejuvenating Solar Flare Termination Shocks as Particle Accelerators | |
4 May 2020 by Bin CHEN | ||
At last, clear evidence for a long-predicted phenomenon. Click the title to read more. | ||
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377 | Broad symmetrical Doppler-shifted Fe XXI line profiles | |
20 April 2020 by Vanessa POLITO | ||
It is difficult to explain "evaporation" line profiles by superposition of unresolved flows. Click the title to read more. | ||
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376 | Phenomena in the unusually long pre-impulsive phase of SOL2011-06-07 | |
13 April 2020 by Marian KARLICKÝ, Jana KAŠPAROVÁ, and Robert SYCH | ||
A massive and slowly-rising filament eruption reveals important new signatures of the physics. Click the title to read more. | ||
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375 | Evidence for a Coronal Shock Wave Origin for Relativistic Protons Producing Solar Gamma-Rays and Observed by Neutron Monitors at Earth | |
6 April 2020 by Athanasios KOULOUMVAKOS and Gerry SHARE | ||
Successful modeling of prolonged solar gamma-ray emissions and terrestrial ground-level cosmic-ray events. Click the title to read more. | ||
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374 | Using overlappogram data to find hot flare plasma | |
23 March 2020 by Louise HARRA | ||
Imaging Fe XXIV at high resolution with the EIS slot data. Click the title to read more. | ||
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373 | SOL2017-09-04 (M5.5) 2017 as a Source of Relativistic Electrons and Protons | |
16 March 2020 by Alexei STRUMINSKII | ||
Flare-accelerated particles, rather than SEPs, energize sustained gamma-ray emission. Click the title to read more. | ||
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372 | Heating of the solar photosphere during a white-light flare | |
2 March 2020 by Jan JURČÁK | ||
The best-ever spectrum of the flare photosphere. Click the title to read more. | ||
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371 | A Hot Cusp-Shaped Confined Solar Flare | |
24 February 2020 by Aaron HERNANDEZ-PEREZ | ||
A flare may have a prominent hot cusp with the help of any eruption. Click the title to read more. | ||
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370 | The Temporal and Spatial Extension of Gamma-ray Emission from the Sun | |
17 February 2020 by Nat GOPALSWAMY | ||
Sustained solar γ-rays and solar cosmic rays. Click the title to read more. | ||
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369 | A PSP Perihelion | |
20 January 2020 by Jessie DUNCAN and Hugh Hudson | ||
The Parker Solar Probe enters its fourth perihelion already. Now. Click the title to read more. | ||
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368 | Remembering John Brown | |
13 January 2020 by Alec MacKINNON | ||
John passed away unexpectedly on 16 November 2019. Click the title to read more. | ||
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367 | A Global Survey of EUV Coronal Power Spectra | |
30 December 2019 by Karl Battams | ||
Time-series parameter maps of imaged power spectra from an AIA pipeline. Click the title to read more. | ||
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366 | Cosmic Rays over the Rainbow Bridge | |
16 December 2019 by Hugh Hudson Alec MacKinnon | ||
Cosmic rays approach the Sun. Click the title to read more. | ||
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365 | Spectropolarimetric Insight into Plasma-Sheet Dynamics of a Solar Flare | |
9 December 2019 by Ryan French | ||
CoMP polarization patterns in SOL2017-09-10 are amazing. Click the title to read more. | ||
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364 | Lorentz Force Evolution Reveals the Energy Build-up Processes during Recurrent Eruptive Solar Flares | |
18 November 2019 by Ranadeep Sarkar, Nandita Srivastava and Astrid Veronig | ||
The net Lorentz force clearly exhibits a build-up and release pattern. Click the title to read more. | ||
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363 | Flare waiting times depend on their magnitudes | |
11 November 2019 by Hugh Hudson | ||
Surprising new evidence for the flare build-up and release process. Click the title to read more. | ||
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362 | Can magnetic reconnection cause solar rainstorms? | |
4 November 2019 by Petra Kohutova | ||
Impulsive coronal heating resulting from reconnection can trigger coronal rain. Click the title to read more. | ||
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361 | Non-radial jets on the edges of active regions | |
14 October 2019 by Peter Wyper | ||
The very common jet structures we see can naturally combine twist and breakout. Click the title to read more. | ||
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360 | Searching SOLfully within the Nuggets | |
7 October 2019 by Hugh Hudson | ||
The IAU target identifier works well for finding items about a particular event. Click the title to read more. | ||
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359 | Submillimeter Radiation as the Thermal Component of the Neupert Effect | |
31 September 2019 by Guillermo Giménez de Castro | ||
Flare radiation at the highest frequencies can be bremsstrahlung. Click the title to read more. | ||
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358 | The "Last Best" Flares | |
24 September 2019 by Hugh Hudson, Ed Cliver, and Brian Dennis | ||
Major flares tend to happen at the very ends of sunspot cycles. Click the title to read more. | ||
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357 | Dynamic Processes of the Moreton Wave on 2014 March 29 | |
16 September 2019 by Denis Cabezas and the FMT team | ||
A beautiful Moreton wave excited by the best-observed flare ever. Click the title to read more. | ||
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356 | EVE-RHESSI DEM Models and the Low-energy Cutoff for Nonthermal Electrons | |
9 September 2019 by Jim McTiernan | ||
Characterizing flare temperature distributions helps to define the non-thermal energy release. Click the title to read more. | ||
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355 | Stealth Coronal Mass Ejections from Active Regions | |
26 August 2019 by Jennifer O'Kane | ||
Perhaps just feeble versions of the same magnetic disease.... Click the title to read more. | ||
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354 | Do Kepler Superflare Stars Really Include Slowly Rotating Sun-like Stars? | |
15 July 2019 by Yuta NOTSU | ||
Kepler superflares hint at solar superflares. Click the title to read more. | ||
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353 | Localized Microwave and EUV Bright Structures in an Eruptive Prominence | |
22 June 2019 by Jing HUANG | ||
Detailed correlations between EUV and microwaves in prominence fine structures. Click the title to read more. | ||
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352 | Broken-up hard X-ray spectra found for a loop-top source during a solar limb flare | |
16 June 2019 by Hao NING, Yao CHEN and Jeongwoo LEE | ||
SOL2017-09-10 coronal hard X-ray sources. Click the title to read more. | ||
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351 | The Cosmic-Ray Shadow and Coronal Magnetism | |
27 May 2019 by Frederik Tenholt | ||
The coronal magnetic field measured in Antarctica. Click the title to read more. | ||
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350 | Kristian Birkeland | |
6 May 2019 by Hugh HUDSON and Lyndsay FLETCHER | ||
Space weather a century ago: Kristian Birkeland. Click the title to read more. | ||
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349 | Warm UV loops heated by small-scale cancellation events | |
22 April 2019 by Seray ŞAHIN and Vasyl YURCHYSHYN | ||
Precisely locating the footpoints of warm coronal loops helps identify their source(s) of excitation. Click the title to read more. | ||
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348 | Multiple Regions of Shock-accelerated Particles during a Solar Coronal Mass Ejection | |
1 April 2019 by Diana MOROSAN | ||
LOFAR identifies herringbone sources within the flank of the SOL2017-09-10 shock - no joke. Click the title to read more. | ||
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347 | Persistent Quasi-Periodic Pulsations Detected During the Large X8.2 Solar Flare | |
25 March 2019 by Laura HAYES and Peter GALLAGHER | ||
The most beautiful flare has the most beautiful pulsations. Click the title to read more. | ||
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346 | Is the coronal magnetic field braiding? | |
11 March 2019 by Markus ASCHWANDEN | ||
This iconic cartoon does not relate well to the observations. Click the title to read more. | ||
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345 | An energetic pre-flare: electron distributions in magnetic reconnection outflows | |
18 February 2019 by Marina BATTAGLIA, Eduard KONTAR and Galina MOTORINA | ||
Assessing energy partition in a pre-impulsive flare development. Click the title to read more. | ||
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344 | Linear Polarization in H-alpha Flares | |
4 February 2019 by Tomoko KAWATE and Yoichiro HANAOKA | ||
H-alpha polarization is rarely observable but, in once case, very suggestive. Click the title to read more. | ||
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343 | Short-Period Waves | |
21 January 2019 by Sijie YU and Bin CHEN | ||
New decimetric imaging spectroscopy suggests Alfvénic energy transport in flares. Click the title to read more. | ||
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342 | The Interesting RHESSI/SAS Archive | |
8 January 2019 by Hugh HUDSON and Martin FIVIAN | ||
The full mission database shows RHESSI to have been very stable geometrically. Click the title to read more. | ||
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341 | Homologous White Light Solar Flares | |
31 December 2018 by Paolo ROMANO and Abouazza ELMHAMDI | ||
Homologous white-light flares, in rapid succession, and coronal null points. Click the title to read more. | ||
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340 | The flight of FOXSI-3 | |
10 December 2018 by Lindsay GLESENER and Noriyuki NARUKAGE | ||
Single-photon counting and direct focusing across hard and soft energies. Click the title to read more. | ||
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339 | Stellar Flares and Starspots | |
3 December 2018 by Lauren DOYLE | ||
Stellar flares don't spatially match their starspots. Click the title to read more. | ||
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338 | Neutron Production in Solar Flares | |
26 November 2018 by Ron MURPHY and Gerry SHARE | ||
Neutron astronomy helps us understand solar flares. Click the title to read more. | ||
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337 | Cycle 25 Strikes Again | |
20 November 2018 by Kamil BICZ | ||
A second, larger Cycle 25 sunspot. Click the title to read more. | ||
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336 | Remembering Marcos Machado via his research | |
13 November 2018 by Hugh HUDSON | ||
Recalling a friend and colleague, and admiring his final paper. Click the title to read more. | ||
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335 | CORONAS/SPIRIT Mg XII and Nanoflares | |
22 October 2018 by Anton REVA | ||
Monochromatic Mg XII spectroheliography sets severe limits on nanoflare heating models. Click the title to read more. | ||
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334 | White-light Emission and Non-thermal Electrons | |
8 October 2018 by Kyoung-Sun LEE | ||
An intimate relationship between accelerated electrons and visible flare continuum. Click the title to read more. | ||
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333 | Coronal Hard X-ray Sources Revisited | |
24 September 2018 by Brian DENNIS | ||
Reporting some over-interpretation of the evidence for "coronal thick targets". Click the title to read more. | ||
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332 | Photospheric response to a flare | |
17 September 2018 by Mike WHEATLAND | ||
Sudden changes in the magnetic field in the low atmosphere associated with particle acceleration. Click the title to read more. | ||
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331 | New Views of Global Solar Magnetic Field Evolution Over Four Solar Cycles | |
27 August 2018 by David WEBB | ||
A digital archive of Pat McIntosh's 44 years of solar synoptic observations. Click the title to read more. | ||
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330 | Understanding the co-spatial return current in solar flares | |
6 August 2018 by Meriem ALAOUI and Gordon HOLMAN | ||
Completing the circuit in a thick-target model. Click the title to read more. | ||
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329 | 3D Magnetic Reconnection at a Coronal Null Point | |
30 July 2018 by Shane MALONEY, Aidan O'Flannagain and Peter Gallagher | ||
Large-scale reconnection involved in Type I radio noise storm. Click the title to read more. | ||
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328 | The true dawn of multimessenger astronomy | |
23 July 2018 by Hugh Hudson | ||
Ever since the Carrington flare. Click the title to read more. | ||
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327 | Microwave Imaging Spectroscopy of Flares is Here | |
16 July 2018 by Dale E. Gary, EOVSA and RHESSI Teams | ||
Microwave imaging spectroscopy takes a giant leap forward with SOL2017-09-10. Click the title to read more. | ||
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326 | Coronal nanoflares powered by footpoint reconnection | |
9 July 2018 by Pradeep Chitta, Hardi Peter, and Sami Solanki | ||
Coronal nanoflares in active region cores can be powered by the magnetic reconnection in the lower solar atmosphere. Click the title to read more. | ||
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325 | A remarkable, but confused, coronal hard X-ray source | |
25 June 2018 by Alexandra Lysenko, Larisa Kashapova and Hugh Hudson | ||
A remarkable flare in 1999 adds to our short list of extended coronal hard X-ray/microwave sources. Click the title to read more. | ||
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324 | Understanding HMI pseudocontinuum in white-light flares | |
28 May 2018 by Michal Švanda et al. | ||
The HMI pseudocontinuum (Ic) is ill-calibrated in regions with strong fields, i.e. for white-light flares. Click the title to read more. | ||
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323 | To beam or not to beam - that is (still) the question | |
14 May 2018 by Paulo Simões and Hugh Hudson | ||
Descriptions of the lower solar atmosphere of flares ca. Cycle 21 sound surprisingly current. Click the title to read more. | ||
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322 | Observation of Cosmic Ray Spallation Events from SoHO | |
7 May 2018 by Serge Koutchmy and Ehsan Tavabi | ||
LASCO's images capture high-energy nuclear interactions from cosmic-ray hits. Click the title to read more. | ||
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321 | A Sunspot from Cycle 25 for sure | |
10 April 2018 by Tomek Mrozek and Hugh Hudson | ||
YES! Cycle 25 is here!. Click the title to read more. | ||
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320 | Blue-wing enhancement of the Mg II h and k lines in a flare | |
9 April 2018 by Akiko TEI | ||
Flare loops involve a cool upflow preceding the hot evaporation flow. Click the title to read more. | ||
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319 | NuSTAR detects X-ray flares in the quiet Sun | |
26 March 2018 by Matej Kuhar and Säm Krucker | ||
Quiet-Sun flares may not be powerful, but they look a lot like ordinary flares. Click the title to read more. | ||
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318 | Homologous CME/flares from AR 12371 | |
19 March 2018 by Panditi Vemareddy and Pascal Demoulín | ||
An excellent set of homologous flare/CMEs analyzed and explained. Click the title to read more. | ||
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317 | Non-Maxwellian Diagnostics from SDO/EVE Spectra of an X-class Flare | |
16 February 2018 by Elena Dzifčáková and Jaroslav Dudík | ||
Ratios of high-excitation ions can readily detect κ-distributions in flare plasmas. Click the title to read more. | ||
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316 | Joint MinXSS and RHESSI Flare X-ray Spectra between 1 and 15 keV | |
5 February 2018 by Chris Moore, Brian Dennis and the MinXSS Science Team | ||
MinXSS adds systematic views of flare soft X-ray spectra to RHESSI imagery. Click the title to read more. | ||
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315 | Parameterized Flare Models with Chromospheric Compressions | |
17 January 2018 by Adam Kowalski & Joel Allred | ||
A new approach to modeling the lower flare atmosphere. Click the title to read more. | ||
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314 | A Curious Sunspot Group in 2018 | |
14 January 2018 by Hugh Hudson | ||
The first new sunspot group of 2018 emerged at the wrong latitude. Click the title to read more. | ||
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313 | Tecumseh's Eclipse and Astrophysics | |
25 December 2017 by Hugh Hudson | ||
The solar corona was first recognized as such, and named, in an eclipse of 1806. Click the title to read more. | ||
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312 | Hunting for Hidden Tiny Flares | |
27 November 2017 by Shin-nosuke ISHIKAWA | ||
FOXSI-2 says that episodic energy releases are still viable as a part of the coronal heating problem.. Click the title to read more. | ||
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311 | Unusual Type III Burst Dynamics Produced by Diverging Magnetic Fields | |
20 November 2017 by Patrick McCauley | ||
Unusual type III bursts follow coronal separatrix structures.. Click the title to read more. | ||
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310 | Valderrama in the 21st Century | |
31 October 2017 by Hugh Hudson | ||
A newly-described white-light flare from the 19th century!... Click the title to read more. | ||
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309 | Electron Scattering in the Flaring Corona | |
24 October 2017 by Sophie Musset | ||
Diffusive transport may contribute to the trapping of electrons in coronal X-ray sources. Click the title to read more. | ||
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308 | The Power of Turbulence | |
25 September 2017 by Nic Bian | ||
Turbulent energy content may underlie flare energy transfer, magnetic reconnection, and particle acceleration. Click the title to read more. | ||
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307 | The Kelvin Force and Loop-Top Concentration | |
18 September 2017 by Kiyoto SHIBASAKI | ||
New physics can explain the perplexing overpressure at the flare looptop regions. Click the title to read more. | ||
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306 | The Last Best Flare of Cycle 24? | |
11 September 2017 by Säm Krucker and Hugh Hudson | ||
Right on schedule, Cycle 24 has produced a great flare (with a GLE). Click the title to read more. | ||
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305 | Electric Current Neutralization and Solar Eruption in Active Regions | |
28 August 2017 by Yang LIU | ||
Active current systems in the solar corona don't have return currents. Click the title to read more. | ||
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304 | RHESSI and the Megamovie | |
31 July 2017 by Hugh Hudson, Laura Peticolas, and Juan Carlos Martínez Oliveros | ||
A wholly new way to view a solar eclipse, and to do solar astrometry. Click the title to read more. | ||
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303 | Bastille Day 2017 | |
24 July 2017 by Hugh Hudson and Säm Krucker | ||
Interesting flares really do happen on Bastille Day.... Click the title to read more. | ||
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302 | The Solar X-ray Limb III | |
12 June 2017 by Marina Battaglia and Gordon Hurford | ||
RHESSI succeeds with a wholly new way to measure the solar diameter. Click the title to read more. | ||
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301 | Double Coronal X-ray and Microwave Sources Associated With A Magnetic Breakout Solar Eruption | |
29 May 2017 by Yao CHEN | ||
A different explanation of the double coronal hard X-ray sources. Click the title to read more. | ||
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300 | A Lasso Model for Solar Gamma-ray Events | |
15 May 2017 by Hugh Hudson | ||
A toy model hoping to explain the SEP/LAT relationship. Click the title to read more. | ||
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