Role of emission angular directionality in spin determination of accreting black holes with a broad iron line

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F09%3A00332636" target="_blank" >RIV/67985815:_____/09:00332636 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Role of emission angular directionality in spin determination of accreting black holes with a broad iron line

Original language description

We discuss the method to determine the spin of black holes by employing the broad relativistic iron line profiles in the X-ray domain. The precision of the spectral fitting procedure could be compromised by an inappropriate account for the angular distribution of the disc emission. Often a unique profile is assumed, invariable over the entire range of radii in the disc and energy in the spectral band. We study how sensitive the spin determination is to the assumptions about the intrinsic angular distribution of the emitted photons. Based on the radiation transfer computations, we produced a new extension to the KY software package for X-ray spectra fitting of relativistic accretion disc models. We found that, from the commonly used simple profiles, theisotropic distribution of the angular emissivity reproduces our model data to the best precision.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BN - Astronomy and celestial mechanics, astrophysics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2009

Confidentiality

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

Name of the periodical

Astronomy and Astrophysics

ISSN

0004-6361

e-ISSN

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Volume of the periodical

507

Issue of the periodical within the volume

1

Country of publishing house

FR - FRANCE

Number of pages

17

Pages from-to

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UT code for WoS article

000271782900006

EID of the result in the Scopus database

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