Electron impact polarization of X-ray lines from hydrogen-like ions during solar flares

Solar Physics ◽  
1981 ◽  
Vol 71 (1) ◽  
pp. 77-89 ◽  
Author(s):  
Eberhard Haug
Keyword(s):  
Electron Impact ◽  
Solar Flares ◽  
X Ray ◽  
Impact Polarization

Energetic particles in solar flares: theory and diagnostics

1991 ◽  
Vol 336 (1643) ◽  
pp. 413-424 ◽  
Keyword(s):  
Solar Flares ◽  
Gamma Ray ◽  
Low Energy ◽  
Emission Data ◽  
Energetic Electrons ◽  
X Ray ◽  
Electrons And Ions ◽  
Low Energy Ions ◽  
Impact Polarization ◽  
Major Progress

Recent progress and future prospects in diagnostics of energetic electrons and ions in the flares are reviewed, together with the roles they play in the flare as a whole. Most of the discussion centres on hard X-ray and gamma-ray and thermal plasma emission data, rather than on radio sources. Since Solar Maximum Mission and Hinotori there has been major progress in all areas of flare electron diagnostics. Electron spectra are now recoverable with some precision, electrons with energies above 10 MeV are known to be highly anisotropic, and indications are available of the spatial distribution of electrons at 20 keV. Timescales of electron acceleration are now known to be shorter than 0.1 s. Energetic electrons are believed to carry much of the flare power. Ion diagnostics are more limited. For greater than 1 MeV ions the flux, spectrum and acceleration timescale are now quite well known. Low energy ions are hard to diagnose but have been invoked as a flare heating mechanism alternative to electron beams. The problems with beam heating models are discussed with special attention to the problems of the low energy proton model and its only direct diagnostic, Hα impact polarization. Finally, theoretical problems associated with return currents and with accelerator requirements are discussed and attention is drawn to the possible importance of entropy as well as energy considerations.

The occurrence of single hard x-ray sources in solar flares

2003 ◽  
Vol 32 (12) ◽  
pp. 2483-2488
Author(s):  
C GOFF ◽  
S MATTHEWS ◽  
L HARRA
Keyword(s):  
Solar Flares ◽  
X Ray

Statistical analysis of soft X-ray solar flares during solar cycles 22, 23, and 24

2021 ◽  
Vol 366 (1) ◽  
Author(s):  
Bo Xiong ◽  
Ting Wang ◽  
Xiaolin Li ◽  
Yunxing Yin
Keyword(s):  
Statistical Analysis ◽  
Solar Flares ◽  
Solar Cycles ◽  
X Ray

A new microwave/X-ray diagnostic for the thermal phase of solar flares

Solar Physics ◽  
1986 ◽  
Vol 105 (1) ◽  
pp. 87-99 ◽  
Author(s):  
E. J. Schmahl ◽  
M. R. Kundu ◽  
F. T. Erskine
Keyword(s):  
Solar Flares ◽  
X Ray ◽  
Thermal Phase

Role of non-thermal electrons on the generation of X-ray and EUV lines in solar flares

1988 ◽  
Vol 148 (1) ◽  
pp. 75-84 ◽  
Author(s):  
Ranjna Bakaya ◽  
R. R. Rausaria ◽  
P. N. Khosa
Keyword(s):  
Solar Flares ◽  
X Ray

The breakdown of the power-law frequency distributions for the hard X-ray peak count rates of solar flares

2013 ◽  
Vol 13 (12) ◽  
pp. 1482-1492 ◽  
Author(s):  
You-Ping Li ◽  
Wei-Qun Gan ◽  
Li Feng ◽  
Si-Ming Liu ◽  
A. Struminsky
Keyword(s):  
Power Law ◽  
Solar Flares ◽  
Frequency Distributions ◽  
X Ray ◽  
Peak Count

Investigation of Hemispherical Variations of Soft X-Ray Solar Flares during Solar Cycles 21 to 24

2021 ◽  
Vol 55 (2) ◽  
pp. 169-182
Author(s):  
Amrita Prasad ◽  
Soumya Roy ◽  
Koushik Ghosh ◽  
Subhash Chandra Panja ◽  
Sankar Narayan Patra
Keyword(s):  
Solar Flares ◽  
Solar Cycles ◽  
X Ray
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