The quiescent X-ray spectrum of accreting black holes
نویسندگان
چکیده
منابع مشابه
The X-ray spectra of accreting Kerr black holes
The relativistic broad iron lines seen in the X-ray spectra of several active galaxies and Galactic black hole systems are reviewed. Most such objects require emission from within the innermost stable orbit of a non-rotating black hole, suggesting that the black holes are rapidly spinning Kerr holes. We discuss the soft excess, the broad iron line and the Compton hump characteristic of reflecti...
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Current astrophysical research suggests that the most persistently luminous objects in the Universe are powered by the flow of matter through accretion disks onto black holes. Accretion disk systems are observed to emit copious radiation across the electromagnetic spectrum, each energy band providing access to rather distinct regimes of physical conditions and geometric scale. X-ray emission pr...
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We present model X-ray spectra of accreting black holes with advection-dominated accretion flows, paying attention to thermal emission lines from the hot plasma. We show that the Advanced X-ray Astrophysical Facility (AXAF) might be able to observe lines from X-ray binaries such as V404 Cyg in quiescence, the Galactic center black hole Sagittarius A, and the nuclei of nearby galaxies such as M8...
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The weakness of X-ray reflection in Cyg X-1 is suggested to be due to vertical motion of the emitting plasma in the active corona of an accretion disk. A mildly relativistic bulk motion causes a reduction of X-ray emission towards the disk which reflects/reprocesses the incident X-rays. The observed slope of the X-ray spectrum and the amount of reflection can both be explained if the flaring pl...
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We propose that the shape of the upper-end X-ray luminosity function (XLF) observed in elliptical galaxies for point sources carries valuable information about the black-hole (BH) mass spectrum among old X-ray transients formed in the galaxies. Here we present the line of arguments and analysis that support this connection and the methodology for deriving the BH mass spectrum slope from the obs...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2014
ISSN: 1365-2966,0035-8711
DOI: 10.1093/mnras/stu832