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The flare model for X-ray variability of NGC 4258
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SYSNO ASEP 0359783 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název The flare model for X-ray variability of NGC 4258 Tvůrce(i) Trzesniewski, T. (PL)
Czerny, B. (PL)
Karas, Vladimír (ASU-R) RID, ORCID
Pecháček, Tomáš (ASU-R)
Dovčiak, Michal (ASU-R) RID, ORCID
Goosmann, R. W. (FR)
Nikolajuk, M. (PL)Celkový počet autorů 7 Zdroj.dok. Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 530, June (2011), A136/1-A136/6Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova accretion disks ; active galaxies ; X-rays Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika CEP GA205/07/0052 GA ČR - Grantová agentura ČR ME09036 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GA202/09/0772 GA ČR - Grantová agentura ČR GP205/09/P468 GA ČR - Grantová agentura ČR CEZ AV0Z10030501 - ASU-R (2005-2011) UT WOS 000291027400136 DOI 10.1051/0004-6361/201016369 Anotace We study the variability mechanism of active galactic nuclei (AGN) within the framework of the flare model. To this end we examine the case of Seyfert/LINER galaxy NGC 4258, which is observed at high inclination angle and exhibits rapid fluctuations of the X-ray light curve. We construct a model light curve based on the assumption of magnetic flares localized in the equatorial plane. We calculate the level of variability as a function of the inclination. Highly inclined sources such as this one are particularly suitable to test the flare model because the effects of orbital motion, Doppler boosting and light bending are all expected to have maximum when the accretion disk is seen almost edge-on. The model is consistent with the NGC 4258 variability, where the obscuring material is thought to be localized mainly towards the equatorial plane. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2012
Počet záznamů: 1