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  • Accretion processes around relativistic compact objects, such as black holes or neutron stars, can be well studied through X-ray spectroscopy. The disc reflection spectra detected in observations of several active galactic nuclei and X-ray binaries in our and nearby galaxies suggest high steepness of the radial emissivity. This can be primarily caused by compactness of the illuminating radiation. In our recent paper [1], we showed that the measurement of the steep radial emissivity index might also be over-estimated by ignoring the radial ionisation structure and the proper angular-emissivity law, which is non-trivial in the fully relativistic regime. In this paper, we demonstrate the interplay of the angular and radial emissivity. Employing an improper angular emissivity in the reflection models leads to over-estimated values for the black-hole angular momentum and the radial-emissivity index (by about 10 %).
  • Accretion processes around relativistic compact objects, such as black holes or neutron stars, can be well studied through X-ray spectroscopy. The disc reflection spectra detected in observations of several active galactic nuclei and X-ray binaries in our and nearby galaxies suggest high steepness of the radial emissivity. This can be primarily caused by compactness of the illuminating radiation. In our recent paper [1], we showed that the measurement of the steep radial emissivity index might also be over-estimated by ignoring the radial ionisation structure and the proper angular-emissivity law, which is non-trivial in the fully relativistic regime. In this paper, we demonstrate the interplay of the angular and radial emissivity. Employing an improper angular emissivity in the reflection models leads to over-estimated values for the black-hole angular momentum and the radial-emissivity index (by about 10 %). (en)
Title
  • On the Interplay Between Radial and Angular Reflection Emissivity from the Black Hole Accretion Disc
  • On the Interplay Between Radial and Angular Reflection Emissivity from the Black Hole Accretion Disc (en)
skos:prefLabel
  • On the Interplay Between Radial and Angular Reflection Emissivity from the Black Hole Accretion Disc
  • On the Interplay Between Radial and Angular Reflection Emissivity from the Black Hole Accretion Disc (en)
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  • RIV/67985815:_____/14:00429140!RIV15-AV0-67985815
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  • RIV/67985815:_____/14:00429140
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  • black holes; accretion disks (en)
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  • [D0B59322739C]
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  • Prague
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  • Relativity and Gravitation, 100 Years after Einstein in Prague
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  • Dovčiak, Michal
  • Karas, Vladimír
  • Svoboda, Jiří
  • Goosmann, René
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issn
  • 0930-8989
number of pages
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  • 10.1007/978-3-319-06761-2_57
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  • Springer International Publishing
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  • 978-3-319-06760-5
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