The Origin of Time Delays between Sub-Terahertz and Soft X-ray Emission from Solar Flares

Smirnova, V.V.; Tsap, Yu. T.; Morgachev, A. S.; Motorina, Galina; Bárta, Miroslav

doi:https://dx.doi.org/10.1134/S0016793221070173

Počet záznamů: 1

The Origin of Time Delays between Sub-Terahertz and Soft X-ray Emission from Solar Flares

1.

SYSNO ASEP	0552406
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	The Origin of Time Delays between Sub-Terahertz and Soft X-ray Emission from Solar Flares
Tvůrce(i)	Smirnova, V.V. (RU) Tsap, Yu. T. (RU) Morgachev, A. S. (RU) Motorina, Galina (ASU-R)_ORCID Bárta, Miroslav (ASU-R)_{RID, ORCID}
Zdroj.dok.	Geomagnetism and Aeronomy. - : MAIK Nauka - Interperiodica - ISSN 0016-7932 Roč. 61, č. 7 (2021), s. 993-1000
Poč.str.	8 s.
Forma vydání	Online - E
Jazyk dok.	eng - angličtina
Země vyd.	RU - Rusko
Klíč. slova	solar flares ; positive spectrum slope ; cross-correlation analysis
Vědní obor RIV	BN - Astronomie a nebeská mechanika, astrofyzika
Obor OECD	Astronomy (including astrophysics,space science)
CEP	GC21-16508J GA ČR - Grantová agentura ČR
Způsob publikování	Omezený přístup
Institucionální podpora	ASU-R - RVO:67985815
UT WOS	000736717300013
EID SCOPUS	85122083098
DOI	10.1134/S0016793221070173
Anotace	The time delays between sub-terahertz (sub-THz) and soft X-ray (SXR) emission from solar flares with a positive spectrum slope at frequencies of >100 GHz are considered. Based on a cross-correlation analysis of the time profiles of sub-THz and SXR emission from 11 flare events obtained from the KOSMA (230 GHz), SST (212 GHz), and RT-7.5 (93 GHz) telescopes, as well as the GOES satellite in channel 1-8 A, we identified two main types of sub-THz events. Type I includes four X-class events with a well-defined Neupert effect, i.e., the sub-THz flux outpaces the SXR flux by 2-9 min. Type II includes seven M-class flares, in which the time profiles behave similarly and the delays do not exceed 30 s. The different mechanisms of radio emission in different layers of the solar atmosphere may be responsible for the positive slope of the sub-THz spectrum of flares.
Pracoviště	Astronomický ústav
Kontakt	Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326
Rok sběru	2022
Elektronická adresa	https://doi.org/10.1134/S0016793221070173

Počet záznamů: 1