Počet záznamů: 1
On the high energy cut-off of accreting sources: Is general relativity relevant?
- 1.
SYSNO ASEP 0496101 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název On the high energy cut-off of accreting sources: Is general relativity relevant? Tvůrce(i) Tamborra, Francesco (ASU-R)
Papadakis, I.E. (GR)
Dovčiak, Michal (ASU-R) RID, ORCID
Svoboda, Jiří (ASU-R) RID, ORCIDZdroj.dok. Monthly Notices of the Royal Astronomical Society. - : Oxford University Press - ISSN 0035-8711
Roč. 475, č. 2 (2018), s. 2045-2050Poč.str. 6 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova black hole physics ; relativistic processes ; Seyfert galaxies Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Obor OECD Astronomy (including astrophysics,space science) CEP GA17-02430S GA ČR - Grantová agentura ČR LTAUSA17095 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora ASU-R - RVO:67985815 UT WOS 000427345900041 EID SCOPUS 85045119258 DOI 10.1093/mnras/stx2987 Anotace The hard X-ray emission observed in accreting compact sources is believed to be produced by inverse Compton scattering of soft photons arising from the accretion disc by energetic electrons thermally distributed above the disc, the so-called X-ray corona. Many independent observations suggest that such coronae should be compact and located very close to the black hole. In this case, general relativistic (GR) effects should play an important role to the continuum X-ray emission from these sources, and, in particular, in the observed high energy cut-off, which is a measure of the intrinsic temperature of the corona. Our results show that the energy shift between the observed and intrinsic high energy cut-off due to GR effects can be as large as two to eight times, depending on the geometry and size of the corona as well as its inclination. We provide estimates of this energy shift in the case of a lamp-post and a flat, rotating corona, around a Kerr and a Schwartzschild black hole, for various inclinations, and coronal sizes. These values could be useful to correct the observed high energy cut-off and/or coronal temperatures, either in the case of individual or large sample of objects. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2019
Počet záznamů: 1