Počet záznamů: 1

Quasi-periodic oscillations in solar X-ray sources

SYSNO ASEP	0360451
Druh ASEP	C - Konferenční příspěvek (mezinárodní konf.)
Zařazení RIV	D - Článek ve sborníku
Název	Quasi-periodic oscillations in solar X-ray sources
Tvůrce(i)	Mészárosová, Hana (ASU-R)_{RID, ORCID} Karlický, Marian (ASU-R)_{RID, ORCID} Fárník, František (ASU-R)_{RID, ORCID}
Celkový počet autorů	3
Zdroj.dok.	Advances in Plasma Astrophysics. - Cambridge : Cambridge University Press, 2011 / Bonanno A. - ISSN 1743-9213 - ISBN 9780521197410
Rozsah stran	s. 252-254
Poč.str.	3 s.
Akce	Symposium of the International Astronomical Union /274./
Datum konání	06.09.2010-10.09.2010
Místo konání	Giardini Naxos
Země	IT - Itálie
Typ akce	WRD
Jazyk dok.	eng - angličtina
Země vyd.	GB - Velká Británie
Klíč. slova	Sun ; flares ; X-rays
Vědní obor RIV	BN - Astronomie a nebeská mechanika, astrofyzika
CEP	IAA300030701 GA AV ČR - Akademie věd
CEZ	AV0Z10030501 - ASU-R (2005-2011)
UT WOS	000305161800059
DOI	10.1017/S1743921311007071
Anotace	We have searched for quasi-periodic oscillations in the hard X-ray emission of solar flares. We have selected 14 flare events which were divided into two groups: a) the events with the X-ray sources located at the flare loop footpoints and b) the events with the X-ray source above the solar limb, i.e. with the loop-top X-ray source. We found that while in the case with the footpoints X-ray sources the quasi-periods of the recorded oscillations were in the interval 2–380 s, in the events with loop-top sources only the quasi-periods longer than 50 s were recognized. These results are probably connected with the MHD oscillation modes of the flaring loop. While the long periods, which are dominant in loop-top sources, are produced by acoustic oscillations along the whole long loop, in the layers close to the loop footpoints also the MHD wave modes in shorter structures with shorter periods are generated.
Pracoviště	Astronomický ústav
Kontakt	Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326
Rok sběru	2012

Počet záznamů: 1