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]].
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|title =  Lorentz Force Evolution Reveals the Energy Build-up Processes during Recurrent Eruptive Solar Flares‎
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|number = 364
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|first_author = Ranadeep Sarkar,
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|second_author = Nandita Srivastava and Astrid Veronig
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|publish_date = 18 November  2019
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|description =  The net Lorentz force clearly exhibits a build-up and release pattern
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|image=Icon364.png}}
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{{Nugget Badge
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|title =  Flare waiting times depend on their magnitudes
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|number = 363
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|first_author = Hugh Hudson
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|second_author =
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|publish_date = 11 November  2019
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|description =  Surprising new evidence for the flare build-up and release process
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|image=Icon363.png}}
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{{Nugget Badge
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|title =  Can magnetic reconnection cause solar rainstorms?‎
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|number = 362
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|first_author = Petra Kohutova
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|second_author =
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|publish_date = 4 November  2019
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|description =  Impulsive coronal heating resulting from reconnection can trigger coronal rain
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|image=Icon362.png}}
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{{Nugget Badge
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|title =  Non-radial jets on the edges of active regions
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|number = 361
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|first_author = Peter Wyper
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|second_author =
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|publish_date = 14 October 2019
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|description =  The very common jet structures we see can naturally combine twist and breakout
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|image=Icon361.png}}
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{{Nugget Badge
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|title =  Searching SOLfully within the Nuggets
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|number = 360
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|first_author = Hugh Hudson
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|second_author =
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|publish_date = 7 October 2019
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|description =  The IAU target identifier works well for finding items about a particular event
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|image=Icon360.png}}
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{{Nugget Badge
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|title =  Submillimeter Radiation as the Thermal Component of the Neupert Effect
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|number = 359
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|first_author = Guillermo Giménez de Castro
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|second_author =
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|publish_date = 31 September 2019
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|description =  Flare radiation at the highest frequencies can be bremsstrahlung
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|image=Icon359.png}}
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|title =  The "Last Best" Flares
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|number = 358
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|first_author = Hugh Hudson,
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|second_author = Ed Cliver, and Brian Dennis
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|publish_date = 24 September 2019
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|description =  Major flares tend to happen at the very ends of sunspot cycles
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|image=Icon358.png}}
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|title =  Dynamic Processes of the Moreton Wave on 2014 March 29‎
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|number = 357
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|first_author = Denis Cabezas
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|second_author = and the FMT team
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|publish_date = 16 September 2019
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|description =  A beautiful Moreton wave excited by the best-observed flare ever
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|image=Icon357.png}}
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|title =  EVE-RHESSI DEM Models and the Low-energy Cutoff for Nonthermal Electrons
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|number = 356
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|first_author = Jim McTiernan
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|second_author =
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|publish_date = 9 September 2019
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|description =  Characterizing flare temperature distributions helps to define the non-thermal energy release
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|image=Icon356.png}}
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|title =  Stealth Coronal Mass Ejections from Active Regions
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|number = 355
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|first_author = Jennifer O'Kane
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|second_author =
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|publish_date = 26 August 2019
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|description =  Perhaps just feeble versions of the same magnetic disease...
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|image=Icon355.png}}
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|title =  Do Kepler Superflare Stars Really Include Slowly Rotating Sun-like Stars?‎
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|number = 354
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|first_author = Yuta NOTSU
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|second_author =
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|publish_date = 15 July 2019
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|description =  Kepler superflares hint at solar superflares
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|image=Icon354.png}}
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{{Nugget Badge
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|title =  Localized Microwave and EUV Bright Structures in an Eruptive Prominence
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|number = 353
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|first_author = Jing HUANG
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|second_author =
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|publish_date = 22 June 2019
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|description =  Detailed correlations between EUV and microwaves in prominence fine structures
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|image=Icon353.png}}
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|title =  Broken-up hard X-ray spectra found for a loop-top source during a solar limb flare
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|number = 352
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|first_author = Hao NING,
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|second_author = Yao CHEN and Jeongwoo LEE
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|publish_date = 16 June 2019
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|description =  SOL2017-09-10 coronal hard X-ray sources
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|image=Icon352.png}}
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|title =  The Cosmic-Ray Shadow and Coronal Magnetism
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|number = 351
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|first_author = Frederik Tenholt
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|second_author =
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|publish_date = 27 May 2019
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|description =  The coronal magnetic field measured in Antarctica
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|image=Icon351.png}}
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{{Nugget Badge
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|title =  Kristian Birkeland
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|number = 350
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|first_author = Hugh HUDSON
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|second_author = and  Lyndsay FLETCHER
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|publish_date = 6 May 2019
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|description =  Space weather a century ago: Kristian Birkeland
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|image=Icon350.png}}
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|title =  Warm UV loops heated by small-scale cancellation events
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|number = 349
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|first_author = Seray ŞAHIN
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|second_author = and  Vasyl YURCHYSHYN
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|publish_date = 22 April 2019
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|description =  Precisely locating the footpoints of warm coronal loops helps identify their source(s) of excitation
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|image=Icon349.png}}
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|title =  Multiple Regions of Shock-accelerated Particles during a Solar Coronal Mass Ejection
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|number = 348
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|first_author = Diana MOROSAN
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|second_author = 
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|publish_date = 1 April 2019
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|description =  LOFAR identifies herringbone sources within the flank of the SOL2017-09-10 shock - no joke
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|image=Icon348.png}}
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|title =  Persistent Quasi-Periodic Pulsations Detected During the Large X8.2 Solar Flare
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|number = 347
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|first_author = Laura HAYES
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|second_author =  and Peter GALLAGHER
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|publish_date = 25 March 2019
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|description =  The most beautiful flare has the most beautiful pulsations
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|image=Icon347.png}}
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|title =  An energetic pre-flare: electron distributions in magnetic reconnection outflows
|title =  An energetic pre-flare: electron distributions in magnetic reconnection outflows
|number = 345
|number = 345
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|first_author = Marina BATTAGLIA
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|first_author = Marina BATTAGLIA,
|second_author =  Eduard KONTAR and Galina MOTORINA
|second_author =  Eduard KONTAR and Galina MOTORINA
|publish_date = 18 February 2019
|publish_date = 18 February 2019
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|number = 338
|number = 338
|first_author = Ron MURPHY
|first_author = Ron MURPHY
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|second_author =  and Gerry Share
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|second_author =  and Gerry SHARE
|publish_date = 26 November 2018
|publish_date = 26 November 2018
|description =  Neutron astronomy helps us understand solar flares
|description =  Neutron astronomy helps us understand solar flares
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|title =  Cycle 25 Strikes Again
|title =  Cycle 25 Strikes Again
|number = 337
|number = 337
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|first_author = Kamil Bicz
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|first_author = Kamil BICZ
|second_author =   
|second_author =   
|publish_date = 20 November 2018
|publish_date = 20 November 2018
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|title =  Remembering Marcos Machado via his research
|title =  Remembering Marcos Machado via his research
|number = 336
|number = 336
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|first_author = Hugh Hudson
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|first_author = Hugh HUDSON
|second_author =   
|second_author =   
|publish_date = 13 November 2018
|publish_date = 13 November 2018
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|title =  CORONAS/SPIRIT Mg XII and Nanoflares‎
|title =  CORONAS/SPIRIT Mg XII and Nanoflares‎
|number = 335
|number = 335
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|first_author = Anton Reva
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|first_author = Anton REVA
|second_author =   
|second_author =   
|publish_date = 22 October 2018
|publish_date = 22 October 2018
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|title =  Coronal Hard X-ray Sources Revisited
|title =  Coronal Hard X-ray Sources Revisited
|number = 333
|number = 333
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|first_author = Brian Dennis
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|first_author = Brian DENNIS
|second_author =   
|second_author =   
|publish_date = 24 September 2018
|publish_date = 24 September 2018
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|title =  Photospheric response to a flare
|title =  Photospheric response to a flare
|number = 332
|number = 332
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|first_author = Mike Wheatland
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|first_author = Mike WHEATLAND
|second_author =   
|second_author =   
|publish_date = 17 September 2018
|publish_date = 17 September 2018
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|title =  New Views of Global Solar Magnetic Field Evolution Over Four Solar Cycles
|title =  New Views of Global Solar Magnetic Field Evolution Over Four Solar Cycles
|number = 331
|number = 331
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|first_author = David Webb
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|first_author = David WEBB
|second_author =   
|second_author =   
|publish_date = 27 August 2018
|publish_date = 27 August 2018
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|title =  Understanding the co-spatial return current in solar flares
|title =  Understanding the co-spatial return current in solar flares
|number = 330
|number = 330
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|first_author = Meriem Alaoui
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|first_author = Meriem ALAOUI
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|second_author =  and Gordon Holman
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|second_author =  and Gordon HOLMAN
|publish_date = 6 August 2018
|publish_date = 6 August 2018
|description = Completing the circuit in a thick-target model   
|description = Completing the circuit in a thick-target model   
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|title =  3D Magnetic Reconnection at a Coronal Null Point
|title =  3D Magnetic Reconnection at a Coronal Null Point
|number = 329
|number = 329
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|first_author = Shane Maloney,
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|first_author = Shane MALONEY,
|second_author = Aidan O'Flannagain and Peter Gallagher
|second_author = Aidan O'Flannagain and Peter Gallagher
|publish_date = 30 July 2018
|publish_date = 30 July 2018

Revision as of 20:00, 12 November 2019

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.

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
Icon364.png
The net Lorentz force clearly exhibits a build-up and release pattern. Click the title to read more.
363 Flare waiting times depend on their magnitudes
11 November 2019 by Hugh Hudson
Icon363.png
Surprising new evidence for the flare build-up and release process. Click the title to read more.
362 Can magnetic reconnection cause solar rainstorms?‎
4 November 2019 by Petra Kohutova
Icon362.png
Impulsive coronal heating resulting from reconnection can trigger coronal rain. Click the title to read more.
361 Non-radial jets on the edges of active regions
14 October 2019 by Peter Wyper
Icon361.png
The very common jet structures we see can naturally combine twist and breakout. Click the title to read more.
360 Searching SOLfully within the Nuggets
7 October 2019 by Hugh Hudson
Icon360.png
The IAU target identifier works well for finding items about a particular event. Click the title to read more.
359 Submillimeter Radiation as the Thermal Component of the Neupert Effect
31 September 2019 by Guillermo Giménez de Castro
Icon359.png
Flare radiation at the highest frequencies can be bremsstrahlung. Click the title to read more.
358 The "Last Best" Flares
24 September 2019 by Hugh Hudson, Ed Cliver, and Brian Dennis
Icon358.png
Major flares tend to happen at the very ends of sunspot cycles. Click the title to read more.
357 Dynamic Processes of the Moreton Wave on 2014 March 29‎
16 September 2019 by Denis Cabezas and the FMT team
Icon357.png
A beautiful Moreton wave excited by the best-observed flare ever. Click the title to read more.
356 EVE-RHESSI DEM Models and the Low-energy Cutoff for Nonthermal Electrons
9 September 2019 by Jim McTiernan
Icon356.png
Characterizing flare temperature distributions helps to define the non-thermal energy release. Click the title to read more.
355 Stealth Coronal Mass Ejections from Active Regions
26 August 2019 by Jennifer O'Kane
Icon355.png
Perhaps just feeble versions of the same magnetic disease.... Click the title to read more.
354 Do Kepler Superflare Stars Really Include Slowly Rotating Sun-like Stars?‎
15 July 2019 by Yuta NOTSU
Icon354.png
Kepler superflares hint at solar superflares. Click the title to read more.
353 Localized Microwave and EUV Bright Structures in an Eruptive Prominence
22 June 2019 by Jing HUANG
Icon353.png
Detailed correlations between EUV and microwaves in prominence fine structures. Click the title to read more.
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
Icon352.png
SOL2017-09-10 coronal hard X-ray sources. Click the title to read more.
351 The Cosmic-Ray Shadow and Coronal Magnetism
27 May 2019 by Frederik Tenholt
Icon351.png
The coronal magnetic field measured in Antarctica. Click the title to read more.
350 Kristian Birkeland
6 May 2019 by Hugh HUDSON and Lyndsay FLETCHER
Icon350.png
Space weather a century ago: Kristian Birkeland. Click the title to read more.
349 Warm UV loops heated by small-scale cancellation events
22 April 2019 by Seray ŞAHIN and Vasyl YURCHYSHYN
Icon349.png
Precisely locating the footpoints of warm coronal loops helps identify their source(s) of excitation. Click the title to read more.
348 Multiple Regions of Shock-accelerated Particles during a Solar Coronal Mass Ejection
1 April 2019 by Diana MOROSAN
Icon348.png
LOFAR identifies herringbone sources within the flank of the SOL2017-09-10 shock - no joke. Click the title to read more.
347 Persistent Quasi-Periodic Pulsations Detected During the Large X8.2 Solar Flare
25 March 2019 by Laura HAYES and Peter GALLAGHER
Icon347.png
The most beautiful flare has the most beautiful pulsations. Click the title to read more.
346 Is the coronal magnetic field braiding?
11 March 2019 by Markus ASCHWANDEN
Icon346.png
This iconic cartoon does not relate well to the observations. Click the title to read more.
345 An energetic pre-flare: electron distributions in magnetic reconnection outflows
18 February 2019 by Marina BATTAGLIA, Eduard KONTAR and Galina MOTORINA
Icon345.png
Assessing energy partition in a pre-impulsive flare development. Click the title to read more.
344 Linear Polarization in H-alpha Flares
4 February 2019 by Tomoko KAWATE and Yoichiro HANAOKA
Icon344.png
H-alpha polarization is rarely observable but, in once case, very suggestive. Click the title to read more.
343 Short-Period Waves
21 January 2019 by Sijie YU and Bin CHEN
Icon343.png
New decimetric imaging spectroscopy suggests Alfvénic energy transport in flares. Click the title to read more.
342 The Interesting RHESSI/SAS Archive
8 January 2019 by Hugh HUDSON and Martin FIVIAN
Icon342.png
The full mission database shows RHESSI to have been very stable geometrically. Click the title to read more.
341 Homologous White Light Solar Flares‎
31 December 2018 by Paolo ROMANO and Abouazza ELMHAMDI
Icon341.png
Homologous white-light flares, in rapid succession, and coronal null points. Click the title to read more.
340 The flight of FOXSI-3
10 December 2018 by Lindsay GLESENER and Noriyuki NARUKAGE
Icon340.png
Single-photon counting and direct focusing across hard and soft energies. Click the title to read more.
339 Stellar Flares and Starspots
3 December 2018 by Lauren DOYLE
Icon339.png
Stellar flares don't spatially match their starspots. Click the title to read more.
338 Neutron Production in Solar Flares
26 November 2018 by Ron MURPHY and Gerry SHARE
Icon338.png
Neutron astronomy helps us understand solar flares. Click the title to read more.
337 Cycle 25 Strikes Again
20 November 2018 by Kamil BICZ
Icon337.png
A second, larger Cycle 25 sunspot. Click the title to read more.
336 Remembering Marcos Machado via his research
13 November 2018 by Hugh HUDSON
Icon336.png
Recalling a friend and colleague, and admiring his final paper. Click the title to read more.
335 CORONAS/SPIRIT Mg XII and Nanoflares‎
22 October 2018 by Anton REVA
Icon335.png
Monochromatic Mg XII spectroheliography sets severe limits on nanoflare heating models. Click the title to read more.
334 White-light Emission and Non-thermal Electrons‎
8 October 2018 by Kyoung-Sun LEE
Icon334.png
An intimate relationship between accelerated electrons and visible flare continuum. Click the title to read more.
333 Coronal Hard X-ray Sources Revisited
24 September 2018 by Brian DENNIS
Icon333.png
Reporting some over-interpretation of the evidence for "coronal thick targets". Click the title to read more.
332 Photospheric response to a flare
17 September 2018 by Mike WHEATLAND
Icon332.png
Sudden changes in the magnetic field in the low atmosphere associated with particle acceleration. Click the title to read more.
331 New Views of Global Solar Magnetic Field Evolution Over Four Solar Cycles
27 August 2018 by David WEBB
Icon331.png
A digital archive of Pat McIntosh's 44 years of solar synoptic observations. Click the title to read more.
330 Understanding the co-spatial return current in solar flares
6 August 2018 by Meriem ALAOUI and Gordon HOLMAN
Icon330.png
Completing the circuit in a thick-target model. Click the title to read more.
329 3D Magnetic Reconnection at a Coronal Null Point
30 July 2018 by Shane MALONEY, Aidan O'Flannagain and Peter Gallagher
Icon329.png
Large-scale reconnection involved in Type I radio noise storm. Click the title to read more.
328 The true dawn of multimessenger astronomy
23 July 2018 by Hugh Hudson
Icon328.png
Ever since the Carrington flare. Click the title to read more.
327 Microwave Imaging Spectroscopy of Flares is Here‎
16 July 2018 by Dale E. Gary, EOVSA and RHESSI Teams
Icon327.png
Microwave imaging spectroscopy takes a giant leap forward with SOL2017-09-10. Click the title to read more.
326 Coronal nanoflares powered by footpoint reconnection
9 July 2018 by Pradeep Chitta, Hardi Peter, and Sami Solanki
Icon326.png
Coronal nanoflares in active region cores can be powered by the magnetic reconnection in the lower solar atmosphere. Click the title to read more.
325 A remarkable, but confused, coronal hard X-ray source
25 June 2018 by Alexandra Lysenko, Larisa Kashapova and Hugh Hudson
Icon325.png
A remarkable flare in 1999 adds to our short list of extended coronal hard X-ray/microwave sources. Click the title to read more.
324 Understanding HMI pseudocontinuum in white-light flares‎
28 May 2018 by Michal Švanda et al.
Icon324.png
The HMI pseudocontinuum (Ic) is ill-calibrated in regions with strong fields, i.e. for white-light flares. Click the title to read more.
323 To beam or not to beam - that is (still) the question
14 May 2018 by Paulo Simões and Hugh Hudson
Icon323.png
Descriptions of the lower solar atmosphere of flares ca. Cycle 21 sound surprisingly current. Click the title to read more.
322 Observation of Cosmic Ray Spallation Events from SoHO‎
7 May 2018 by Serge Koutchmy and Ehsan Tavabi
Icon322.png
LASCO's images capture high-energy nuclear interactions from cosmic-ray hits. Click the title to read more.
321 A Sunspot from Cycle 25 for sure
10 April 2018 by Tomek Mrozek and Hugh Hudson
Icon321.png
YES! Cycle 25 is here!. Click the title to read more.
320 Blue-wing enhancement of the Mg II h and k lines in a flare
9 April 2018 by Akiko TEI
Icon320.png
Flare loops involve a cool upflow preceding the hot evaporation flow. Click the title to read more.
319 NuSTAR detects X-ray flares in the quiet Sun
26 March 2018 by Matej Kuhar and Säm Krucker
Icon319.png
Quiet-Sun flares may not be powerful, but they look a lot like ordinary flares. Click the title to read more.
318 Homologous CME/flares from AR 12371
19 March 2018 by Panditi Vemareddy and Pascal Demoulín
Icon318.png
An excellent set of homologous flare/CMEs analyzed and explained. Click the title to read more.
317 Non-Maxwellian Diagnostics from SDO/EVE Spectra of an X-class Flare
16 February 2018 by Elena Dzifčáková and Jaroslav Dudík
Icon317.png
Ratios of high-excitation ions can readily detect κ-distributions in flare plasmas. Click the title to read more.
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
Icon316.png
MinXSS adds systematic views of flare soft X-ray spectra to RHESSI imagery. Click the title to read more.
315 Parameterized Flare Models with Chromospheric Compressions
17 January 2018 by Adam Kowalski & Joel Allred
FlareModelsKowalskiAllred.png
A new approach to modeling the lower flare atmosphere. Click the title to read more.
314 A Curious Sunspot Group in 2018
14 January 2018 by Hugh Hudson
Icon314.png
The first new sunspot group of 2018 emerged at the wrong latitude. Click the title to read more.
313 Tecumseh's Eclipse and Astrophysics
25 December 2017 by Hugh Hudson
Icon313.png
The solar corona was first recognized as such, and named, in an eclipse of 1806. Click the title to read more.
312 Hunting for Hidden Tiny Flares
27 November 2017 by Shin-nosuke ISHIKAWA
Icon312.png
FOXSI-2 says that episodic energy releases are still viable as a part of the coronal heating problem.. Click the title to read more.
311 Unusual Type III Burst Dynamics Produced by Diverging Magnetic Fields
20 November 2017 by Patrick McCauley
Icon311.png
Unusual type III bursts follow coronal separatrix structures.. Click the title to read more.
310 Valderrama in the 21st Century
31 October 2017 by Hugh Hudson
Icon310.png
A newly-described white-light flare from the 19th century!... Click the title to read more.
309 Electron Scattering in the Flaring Corona
24 October 2017 by Sophie Musset
Icon309.png
Diffusive transport may contribute to the trapping of electrons in coronal X-ray sources. Click the title to read more.
308 The Power of Turbulence
25 September 2017 by Nic Bian
Icon308.png
Turbulent energy content may underlie flare energy transfer, magnetic reconnection, and particle acceleration. Click the title to read more.
307 The Kelvin Force and Loop-Top Concentration
18 September 2017 by Kiyoto SHIBASAKI
Icon307.png
New physics can explain the perplexing overpressure at the flare looptop regions. Click the title to read more.
306 The Last Best Flare of Cycle 24?
11 September 2017 by Säm Krucker and Hugh Hudson
Icon306.png
Right on schedule, Cycle 24 has produced a great flare (with a GLE). Click the title to read more.
305 Electric Current Neutralization and Solar Eruption in Active Regions
28 August 2017 by Yang LIU
Icon305.png
Active current systems in the solar corona don't have return currents. Click the title to read more.
304 RHESSI and the Megamovie
31 July 2017 by Hugh Hudson, Laura Peticolas, and Juan Carlos Martínez Oliveros
Icon304.png
A wholly new way to view a solar eclipse, and to do solar astrometry. Click the title to read more.
303 Bastille Day 2017
24 July 2017 by Hugh Hudson and Säm Krucker
Icon303.png
Interesting flares really do happen on Bastille Day.... Click the title to read more.
302 The Solar X-ray Limb III
12 June 2017 by Marina Battaglia and Gordon Hurford
Icon302.png
RHESSI succeeds with a wholly new way to measure the solar diameter. Click the title to read more.
301 Double Coronal X-ray and Microwave Sources Associated With A Magnetic Breakout Solar Eruption
29 May 2017 by Yao CHEN
Icon301.png
A different explanation of the double coronal hard X-ray sources. Click the title to read more.
300 A Lasso Model for Solar Gamma-ray Events
15 May 2017 by Hugh Hudson
Icon300.png
A toy model hoping to explain the SEP/LAT relationship. Click the title to read more.

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