Počet záznamů: 1  

Shock-reflected electrons and X-ray line spectra

  1. 1. 0478684 - ASU-R 2018 RIV FR eng J - Článek v odborném periodiku
    Dzifčáková, Elena - Vandas, Marek - Karlický, Marian
    Shock-reflected electrons and X-ray line spectra.
    Astronomy & Astrophysics. Roč. 603, July (2017), A17/1-A17/8 E-ISSN 1432-0746
    Grant CEP: GA ČR(CZ) GA17-16447S; GA ČR GAP209/12/0103; GA ČR(CZ) GA14-19376S; GA ČR(CZ) GA17-06065S; GA ČR GA15-17490S; GA ČR(CZ) GA16-13277S
    Institucionální podpora: RVO:67985815
    Klíčová slova: Sun * flares * line formation
    Kód oboru RIV: BN - Astronomie a nebeská mechanika, astrofyzika
    Obor OECD: Astronomy (including astrophysics,space science)
    Impakt faktor: 5.565, rok: 2017

    The aim of this paper is to try to explain the physical origin of the non-thermal electron distribution that is able to form the enhanced intensities of satellite lines in the X-ray line spectra observed during the impulsive phases of some solar flares. Synthetic X-ray line spectra of the distributions composed of the distribution of shock reflected electrons and the background Maxwellian distribution are calculated in the approximation of non-Maxwellian ionization, recombination, excitation and de-excitation rates. The distribution of shock reflected electrons is determined analytically. We found that the distribution of electrons reflected at the nearly-perpendicular shock resembles, at its high-energy part, the so called n-distribution. Therefore it could be able to explain the enhanced intensities of Si XIId satellite lines. However, in the region immediately in front of the shock its effect is small because electrons in background Maxwellian plasma are much more numerous there.

    Trvalý link: http://hdl.handle.net/11104/0274744