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Shock-drift accelerated electrons and n-distribution

SYSNO ASEP	0463131
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Shock-drift accelerated electrons and n-distribution
Author(s)	Vandas, Marek (ASU-R)_{RID, ORCID} Karlický, Marian (ASU-R)_{RID, ORCID}
Source Title	Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361 Roč. 591, July (2016), A127/1-A127/6
Number of pages	6 s.
Publication form	Online - E
Language	eng - English
Country	FR - France
Keywords	shock waves ; acceleration of particles ; Sun flares
Subject RIV	BN - Astronomy, Celestial Mechanics, Astrophysics
OECD category	Astronomy (including astrophysics,space science)
R&D Projects	GA14-19376S GA ČR - Czech Science Foundation (CSF)
	GA15-17490S GA ČR - Czech Science Foundation (CSF)
	GAP209/12/0103 GA ČR - Czech Science Foundation (CSF)
Institutional support	ASU-R - RVO:67985815
UT WOS	000379141300136
EID SCOPUS	84977110680
DOI	10.1051/0004-6361/201527183
Annotation	By analyzing soft X-ray spectra observed during the impulsive phase of several solar flares, the n-distribution function of superthermal electrons has been detected. In the paper we try to answer the question of whether electrons with this type of distribution function can be produced in a shock, e.g. in a flare termination shock. We use analytical and numerical methods to compute distribution functions of electrons accelerated by a shock. We analytically derive the distribution functions of reflected electrons at quasi-perpendicular shocks. We also consider the influence of the electrostatic cross-shock potential, shock curvature, and the role of the upstream seed population on these distributions. The computed distributions are compared with the n-distributions. We found that a high-energy part of the distribution of electrons reflected at a quasi-perpendicular shock can be very well fitted by the n-distribution in all the cases we studied. This provides a chance to detect the flare termination shock.
Workplace	Astronomical Institute
Contact	Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326
Year of Publishing	2017

Number of the records: 1