On the Interplay Between Radial and Angular Reflection Emissivity from the Black Hole Accretion Disc

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F14%3A00429140" target="_blank" >RIV/67985815:_____/14:00429140 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/978-3-319-06761-2_57" target="_blank" >http://dx.doi.org/10.1007/978-3-319-06761-2_57</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-319-06761-2_57" target="_blank" >10.1007/978-3-319-06761-2_57</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On the Interplay Between Radial and Angular Reflection Emissivity from the Black Hole Accretion Disc

Popis výsledku v původním jazyce

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 %).

Název v anglickém jazyce

On the Interplay Between Radial and Angular Reflection Emissivity from the Black Hole Accretion Disc

Popis výsledku anglicky

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 %).

Druh

D - Stať ve sborníku

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Relativity and Gravitation, 100 Years after Einstein in Prague

ISBN

978-3-319-06760-5

ISSN

0930-8989

e-ISSN

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Počet stran výsledku

8

Strana od-do

415-422

Název nakladatele

Springer International Publishing

Místo vydání

Cham

Místo konání akce

Prague

Datum konání akce

25. 6. 2012

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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