RHESSI Science Nuggets

From RHESSI Wiki

(Difference between revisions)
Jump to: navigation, search
(Removed erroneous quote marks)
(Threw in some italics)
Line 29: Line 29:
|second_author =  
|second_author =  
|publish_date = 11 May 2009
|publish_date = 11 May 2009
-
|description = Do the standard cartoon models of solar flares describe the microflares as well?
+
|description = ''Do the standard cartoon models of solar flares describe the microflares as well?''
|image = icon101b.png
|image = icon101b.png
}}
}}
Line 39: Line 39:
|second_author = Bob Lin
|second_author = Bob Lin
|publish_date = 29 April 2009
|publish_date = 29 April 2009
-
|description = A brief history of RHESSI.
+
|description = ''A brief history of RHESSI.''
|image = Icon100.jpg
|image = Icon100.jpg
}}
}}
Line 49: Line 49:
|second_author = Hugh Hudson
|second_author = Hugh Hudson
|publish_date = 13 April 2009
|publish_date = 13 April 2009
-
|description = Cycle 24 is definitely late in arriving, and it's interesting, but this probably has happened before.
+
|description = ''Cycle 24 is definitely late in arriving, and it's interesting, but this probably has happened before.''
|image = icon99.jpg
|image = icon99.jpg
}}
}}
Line 59: Line 59:
|second_author =  
|second_author =  
|publish_date = 30 March 2009
|publish_date = 30 March 2009
-
|description = Exploring Chree analysis as applied to total solar irradiance measurements of flares.
+
|description = ''Exploring Chree analysis as applied to total solar irradiance measurements of flares.''
|image = icon98.jpg
|image = icon98.jpg
}}
}}
Line 69: Line 69:
|second_author =  
|second_author =  
|publish_date = 16 March 2009
|publish_date = 16 March 2009
-
|description = RHESSI discovers high temperatures, well above those of the corona, in quiescent active regions.
+
|description = ''RHESSI discovers high temperatures, well above those of the corona, in quiescent active regions.''
|image = icon97.jpg
|image = icon97.jpg
}}
}}
Line 79: Line 79:
|second_author = and Fabio Reale
|second_author = and Fabio Reale
|publish_date = 2 March 2009
|publish_date = 2 March 2009
-
|description = A recent re-analysis of the relationship between emission measure and temperature in flares stimulates this new nugget.
+
|description = ''A recent re-analysis of the relationship between emission measure and temperature in flares stimulates this new nugget.''
|image = icon96.png
|image = icon96.png
}}
}}
Line 89: Line 89:
|second_author =  
|second_author =  
|publish_date = 16 February 2009
|publish_date = 16 February 2009
-
|description = Though we expect flare implosions, we frequently observe explosions (i.e. eruptions).  In this nugget, an observation of a contracting flare is described and analyzed.
+
|description = ''Though we expect flare implosions, we frequently observe explosions (i.e. eruptions).  In this nugget, an observation of a contracting flare is described and analyzed.''
|image = icon95.png
|image = icon95.png
}}
}}
Line 99: Line 99:
|second_author =  
|second_author =  
|publish_date = 2 February 2009
|publish_date = 2 February 2009
-
|description = During the sesquicentennial of the Carrington flare, let us not forget how "Space Weather" got its start.
+
|description = ''During the sesquicentennial of the Carrington flare, let us not forget how "Space Weather" got its start''.
|image = Icon94.jpg
|image = Icon94.jpg
}}
}}
Line 109: Line 109:
|second_author = and Hugh Hudson
|second_author = and Hugh Hudson
|publish_date = 21 January 2009
|publish_date = 21 January 2009
-
|description = Large-scale plasma motions, as in magnetic reconnection, can directly accelerate high-energy particles.
+
|description = ''Large-scale plasma motions, as in magnetic reconnection, can directly accelerate high-energy particles.''
|image = Icon93.jpg
|image = Icon93.jpg
}}
}}
Line 119: Line 119:
|second_author = and Jim McTiernan  
|second_author = and Jim McTiernan  
|publish_date = 5 January 2009
|publish_date = 5 January 2009
-
|description = Comparing RHESSI images with ones simulated from TRACE "white light" reveals striking similarities but intriguing differences.
+
|description ='' Comparing RHESSI images with ones simulated from TRACE "white light" reveals striking similarities but intriguing differences.''
|image = Icon92.jpg
|image = Icon92.jpg
}}
}}
Line 129: Line 129:
|second_author = and Steven Christe  
|second_author = and Steven Christe  
|publish_date = 22 December 2008
|publish_date = 22 December 2008
-
|description = Solar cycle 24 seems to be delayed. Where are the spots? This Nugget discusses the problem and reviews the recent Solar24 meeting, the first in our field to be [http://sprg.ssl.berkeley.edu/~tohban/wiki/index.php/Solar_Cycle_24 Wikified].
+
|description = ''Solar cycle 24 seems to be delayed. Where are the spots? This Nugget discusses the problem and reviews the recent Solar24 meeting, the first in our field to be [http://sprg.ssl.berkeley.edu/~tohban/wiki/index.php/Solar_Cycle_24 Wikified].''
|image = Icon91.png
|image = Icon91.png
}}
}}
Line 139: Line 139:
|second_author = and Procheta Mallik  
|second_author = and Procheta Mallik  
|publish_date = 1 December 2008
|publish_date = 1 December 2008
-
|description = Compton scattering makes the Sun visible at high energies, via processes related to the galactic cosmic rays. This is not your ordinary Bremsstrahlung...
+
|description = ''Compton scattering makes the Sun visible at high energies, via processes related to the galactic cosmic rays. This is not your ordinary Bremsstrahlung...''
|image = Icon90.jpg
|image = Icon90.jpg
}}
}}
Line 149: Line 149:
|second_author = and Eduard Kontar  
|second_author = and Eduard Kontar  
|publish_date = 17 November 2008
|publish_date = 17 November 2008
-
|description = Solar hard X-rays tend to have a power-law distribution in energy, implying infinite photon numbers at low energy (a "soft X-ray catastrophe"). Can we observe what limits this behavior?
+
|description = ''Solar hard X-rays tend to have a power-law distribution in energy, implying infinite photon numbers at low energy (a "soft X-ray catastrophe"). Can we observe what limits this behavior?''
|image = Icon89.png
|image = Icon89.png
}}
}}
Line 159: Line 159:
|second_author = and Allan Tylka
|second_author = and Allan Tylka
|publish_date = 3 November 2008
|publish_date = 3 November 2008
-
|description = The spectral evolution of a solar hard X-ray burst may give a clue to the acceleration of solar energetic particles (SEPs). This RHESSI Science Nugget questions the validity of this predictor.
+
|description = ''The spectral evolution of a solar hard X-ray burst may give a clue to the acceleration of solar energetic particles (SEPs). This RHESSI Science Nugget questions the validity of this predictor.''
|image = Yohkoh countrate 06051998.jpg
|image = Yohkoh countrate 06051998.jpg
}}
}}
Line 179: Line 179:
|second_author = and Arnold Benz
|second_author = and Arnold Benz
|publish_date = 13 October 2008  
|publish_date = 13 October 2008  
-
|description = Solar decimetric radio bursts - but only the good guys - correlate well with RHESSI hard X-rays.
+
|description = ''Solar decimetric radio bursts - but only the good guys - correlate well with RHESSI hard X-rays.''
|image = Icon 86.jpg
|image = Icon 86.jpg
}}
}}
Line 189: Line 189:
|second_author = and Hugh Hudson
|second_author = and Hugh Hudson
|publish_date = 2008-09-29
|publish_date = 2008-09-29
-
|description = RHESSI makes optical images as well as X-ray and gamma-ray ones. This Nugget explains how.
+
|description = ''RHESSI makes optical images as well as X-ray and gamma-ray ones. This Nugget explains how.''
|image = RHESSI_optical_images_icon.png
|image = RHESSI_optical_images_icon.png
}}
}}
Line 199: Line 199:
|second_author = and Richard Starr
|second_author = and Richard Starr
|publish_date =  2008-09-15
|publish_date =  2008-09-15
-
|description =MESSENGER is now exploring Mercury. It is also helping RHESSI to understand the solar X-ray spectrum and measure elemental abundances in flares.
+
|description = ''MESSENGER is now exploring Mercury. It is also helping RHESSI to understand the solar X-ray spectrum and measure elemental abundances in flares.''
|image = Icon 84.jpg
|image = Icon 84.jpg
}}
}}
Line 209: Line 209:
|second_author = and Lyndsay Fletcher
|second_author = and Lyndsay Fletcher
|publish_date = 2008-08-27
|publish_date = 2008-08-27
-
|description = Observations during the rise phase of a M5.4 flare suggests that hard x-rays may be associated with a jet observed by TRACE.
+
|description = ''Observations during the rise phase of a M5.4 flare suggests that hard x-rays may be associated with a jet observed by TRACE.''
|image = Icon 83.jpg
|image = Icon 83.jpg
}}
}}
Line 219: Line 219:
|second_author = and Beate Stelzer
|second_author = and Beate Stelzer
|publish_date = 2008-08-11
|publish_date = 2008-08-11
-
|description = In this nugget, we explore an extrasolar flare (aka stellar flare). These stellar and solar flares are similar but it is often in subtle differences that we may learn the most.
+
|description = ''In this Nugget, we explore an extrasolar flare (aka stellar flare). These stellar and solar flares are similar but it is often in subtle differences that we may learn the most.''
|image = Icon 82.jpg
|image = Icon 82.jpg
}}
}}
Line 229: Line 229:
|second_author = and Hugh Hudson
|second_author = and Hugh Hudson
|publish_date = 2008-07-28
|publish_date = 2008-07-28
-
|description = Another look at microflare positions...
+
|description = ''Another look at microflare positions...''
|image = Icon 81.jpg
|image = Icon 81.jpg
}}
}}
Line 239: Line 239:
|second_author = and Brian Welsch
|second_author = and Brian Welsch
|publish_date = 2008-07-14
|publish_date = 2008-07-14
-
|description = The sudden energy release of a flare in the solar atmosphere has many consequences. One of them may be the McClymont Jerk.
+
|description = ''The sudden energy release of a flare in the solar atmosphere has many consequences. One of them may be the McClymont Jerk''.
|image = Icon 80.jpg
|image = Icon 80.jpg
}}
}}
For all previous Nuggets go to the [http://sprg.ssl.berkeley.edu/~tohban/nuggets/ old RHESSI Science Nugget Page.]
For all previous Nuggets go to the [http://sprg.ssl.berkeley.edu/~tohban/nuggets/ old RHESSI Science Nugget Page.]

Revision as of 01:29, 9 June 2009

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. If you are looking for older Nuggets than please visit the old RHESSI Science Nuggets and use the search facilities there; for Nuggets in the Wiki format, use your browser's search facility for title words or authors. We welcome volunteer authors - please see our page of help for authors.


103 STEREO observed stealth CME
8 June 2009 by Eva Robbrecht
Icon103.jpg
Spectacular coronal effects with no chromospheric counterpart. Click the title to read more.
102 Hard X-ray Pulsations in Flares
25 May 2009 by Andrew Inglis & Valery Nakariakov
Icon102.png
"Coronal seismology" via hard X-rays and microwaves. Click the title to read more.
101 RHESSI microflares - Flare Cartoons and Reality
11 May 2009 by Sigrid Berkebile-Stoiser
Icon101b.png
Do the standard cartoon models of solar flares describe the microflares as well?. Click the title to read more.
100 RHESSI - Concept to Fruition
29 April 2009 by Brian Dennis & Bob Lin
Icon100.jpg
A brief history of RHESSI.. Click the title to read more.
99 Cycle 24 - don't panic yet!
13 April 2009 by Leif Svalgaard and Hugh Hudson
Icon99.jpg
Cycle 24 is definitely late in arriving, and it's interesting, but this probably has happened before.. Click the title to read more.
98 Chree Analysis for Flares
30 March 2009 by Hugh Hudson
Icon98.jpg
Exploring Chree analysis as applied to total solar irradiance measurements of flares.. Click the title to read more.
97 High Temperatures in Active Regions
16 March 2009 by Jim McTiernan
Icon97.jpg
RHESSI discovers high temperatures, well above those of the corona, in quiescent active regions.. Click the title to read more.
96 The Jakimiec Track
2 March 2009 by Hugh Hudson and Fabio Reale
Icon96.png
A recent re-analysis of the relationship between emission measure and temperature in flares stimulates this new nugget.. Click the title to read more.
95 Coronal implosion
16 February 2009 by Rui Liu
Icon95.png
Though we expect flare implosions, we frequently observe explosions (i.e. eruptions). In this nugget, an observation of a contracting flare is described and analyzed.. Click the title to read more.
94 Other Discoveries from Carrington's Flare
2 February 2009 by Hugh Hudson
link=Other Discoveries from Carrington%27s Flare
During the sesquicentennial of the Carrington flare, let us not forget how "Space Weather" got its start.. Click the title to read more.
93 Collapsing Traps
21 January 2009 by Boris Somov and Hugh Hudson
Icon93.jpg
Large-scale plasma motions, as in magnetic reconnection, can directly accelerate high-energy particles.. Click the title to read more.
92 RHESSI Simulations of Complicated Flares
5 January 2009 by Lyndsay Fletcher and Jim McTiernan
Icon92.jpg
Comparing RHESSI images with ones simulated from TRACE "white light" reveals striking similarities but intriguing differences.. Click the title to read more.
91 Cycle 24
22 December 2008 by Hugh Hudson and Steven Christe
Icon91.png
Solar cycle 24 seems to be delayed. Where are the spots? This Nugget discusses the problem and reviews the recent Solar24 meeting, the first in our field to be Wikified.. Click the title to read more.
90 Inverse Compton X-rays from relativistic flare leptons
1 December 2008 by Alec MacKinnon and Procheta Mallik
Icon90.jpg
Compton scattering makes the Sun visible at high energies, via processes related to the galactic cosmic rays. This is not your ordinary Bremsstrahlung.... Click the title to read more.
89 The Rise and Fall of The Low Energy Cut Off
17 November 2008 by Ewan Dickson and Eduard Kontar
Icon89.png
Solar hard X-rays tend to have a power-law distribution in energy, implying infinite photon numbers at low energy (a "soft X-ray catastrophe"). Can we observe what limits this behavior?. Click the title to read more.
88 SEPs Link not Confirmed
3 November 2008 by Gerry Share and Allan Tylka
Yohkoh countrate 06051998.jpg
The spectral evolution of a solar hard X-ray burst may give a clue to the acceleration of solar energetic particles (SEPs). This RHESSI Science Nugget questions the validity of this predictor.. Click the title to read more.
87 The SphinX Instrument on CORONAS-PHOTON
22 October 2008 by Janusz Sylwester and Ken Phillips
CORONAS signing.jpg
An exciting new instrument will begin observations at an exciting time.. Click the title to read more.
86 The Good Guys and the Rascals
13 October 2008 by B. Dabrowski and Arnold Benz
Icon 86.jpg
Solar decimetric radio bursts - but only the good guys - correlate well with RHESSI hard X-rays.. Click the title to read more.
85 RHESSI Optical Images
2008-09-29 by H. Jabran Zahid and Hugh Hudson
RHESSI optical images icon.png
RHESSI makes optical images as well as X-ray and gamma-ray ones. This Nugget explains how.. Click the title to read more.
84 Flare Plasma Abundances - New X-ray Observations
2008-09-15 by Brian Dennis and Richard Starr
Icon 84.jpg
MESSENGER is now exploring Mercury. It is also helping RHESSI to understand the solar X-ray spectrum and measure elemental abundances in flares.. Click the title to read more.
83 [[Hard X-rays from a Jet?]]
2008-08-27 by Hazel Miller Bain and Lyndsay Fletcher
link=Hard X-rays from a Jet?
Observations during the rise phase of a M5.4 flare suggests that hard x-rays may be associated with a jet observed by TRACE.. Click the title to read more.
82 [[Are Stellar Flares like Solar Flares?]]
2008-08-11 by Hugh Hudson and Beate Stelzer
link=Are Stellar Flares like Solar Flares?
In this Nugget, we explore an extrasolar flare (aka stellar flare). These stellar and solar flares are similar but it is often in subtle differences that we may learn the most.. Click the title to read more.
81 [[The Microflare Height Distribution]]
2008-07-28 by Steven Christe and Hugh Hudson
link=The Microflare Height Distribution
Another look at microflare positions.... Click the title to read more.
80 [[The McClymont Jerk]]
2008-07-14 by Hugh Hudson and Brian Welsch
link=The McClymont Jerk
The sudden energy release of a flare in the solar atmosphere has many consequences. One of them may be the McClymont Jerk.. Click the title to read more.

For all previous Nuggets go to the old RHESSI Science Nugget Page.

Personal tools
Namespaces
Variants
Actions
Navigation
Toolbox