Počet záznamů: 1
Shock-reflected electrons and X-ray line spectra
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SYSNO ASEP 0478684 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Shock-reflected electrons and X-ray line spectra Tvůrce(i) Dzifčáková, Elena (ASU-R) RID, ORCID
Vandas, Marek (ASU-R) RID, ORCID
Karlický, Marian (ASU-R) RID, ORCIDZdroj.dok. Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 603, July (2017), A17/1-A17/8Poč.str. 8 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova Sun ; flares ; line formation Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Obor OECD Astronomy (including astrophysics,space science) CEP GA17-16447S GA ČR - Grantová agentura ČR GAP209/12/0103 GA ČR - Grantová agentura ČR GA14-19376S GA ČR - Grantová agentura ČR GA17-06065S GA ČR - Grantová agentura ČR GA15-17490S GA ČR - Grantová agentura ČR GA16-13277S GA ČR - Grantová agentura ČR Institucionální podpora ASU-R - RVO:67985815 UT WOS 000406619100075 EID SCOPUS 85021699068 DOI 10.1051/0004-6361/201630306 Anotace 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.
Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2018
Počet záznamů: 1