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An X-ray variable absorber within the broad line region in Fairall 51
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SYSNO ASEP 0452143 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název An X-ray variable absorber within the broad line region in Fairall 51 Tvůrce(i) Svoboda, Jiří (ASU-R) RID, ORCID
Beuchert, T. (DE)
Guainazzi, M. (IT)
Longinotti, A. L. (ES)
Piconcelli, E. (IT)
Wilms, J. (DE)Zdroj.dok. Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 578, June (2015), A96/1-A96/11Poč.str. 11 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova active galactic nuclei ; supermassive black-holes ; warped accretion discs Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Obor OECD Astronomy (including astrophysics,space science) CEP GP14-20970P GA ČR - Grantová agentura ČR Institucionální podpora ASU-R - RVO:67985815 UT WOS 000357502600108 DOI 10.1051/0004-6361/201425453 Anotace In our research, we observed Fairall 51 with the X-ray satellite Suzaku in order to constrain a characteristic time scale of its variability. We found that the 0.5-50 keV broadband X-ray spectra are dominated by a primary power-law emission (with the photon index similar to 2). This emission is affected by at least three absorbers with different ionisations (log xi approximate to 1-4). The spectrum is shaped further by a reprocessed emission, possibly coming from two regions, the accretion disc and a more distant scattering region. The accretion disc emission is smeared by the relativistic effects, from which we measured the spin of the black hole as a approximate to 0.8 +/- 0.2. We found that most of the spectral variability can be attributed to the least ionised absorber whose column density changed by a factor of two between the first (highest-flux) and the last (lowest-flux) observation. A week-long scale of the variability indicates that the absorber is located at the distance approximate to 0.05 pc from the centre, i.e., in the broad line region. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2016
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