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Understanding the iron K alpha line emissivity profile with GR radiative transfer code
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SYSNO ASEP 0539460 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Understanding the iron K alpha line emissivity profile with GR radiative transfer code Author(s) Zhang, Wenda (ASU-R) ORCID
Dovčiak, Michal (ASU-R) RID, ORCID
Bursa, Michal (ASU-R) RID, ORCID
Svoboda, Jiří (ASU-R) RID, ORCID
Karas, Vladimír (ASU-R) RID, ORCIDSource Title Proceedings of RAGtime 20/22: Workshops on black holes and neutron stars. - Opava : Silesian University, 2020 - ISBN 978-80-7510-433-5 Pages s. 383-396 Number of pages 14 s. Publication form Online - E Action RAGtime /20.-22./ Event date 15.10.2018 - 19.10.2018 VEvent location Opava Country CZ - Czech Republic Event type WRD Language eng - English Country CZ - Czech Republic Keywords emissivity profiles ; accretion discs ; radiative transfer Subject RIV BN - Astronomy, Celestial Mechanics, Astrophysics OECD category Astronomy (including astrophysics,space science) R&D Projects GA17-02430S GA ČR - Czech Science Foundation (CSF) Institutional support ASU-R - RVO:67985815 Annotation In this work, we present calculations of the illumination and the iron K alpha emissivity profiles performed with the GR radiative transfer code Monk that employs the Monte Carlo method. In most previous studies the distinction between the illumination and emissivity profiles was not clearly made. For AGN discs, the emissivity profile has a similar shape with the illumination profile, but in the inner most region the former is steeper than the latter, where as for accretion discs in black hole X-ray binaries, the distinction between the two profiles is more dramatic. We find out that the different behavior between AGN and black hole X-ray binary discs is due to the different energy spectra of the illuminating radiation. This suggests that the emissivity profile of the iron Kαline cannot be determined by black hole spin and corona geometry alone and the energy spectrum of the illuminating radiation has to be taken into account. We also study the dependence of the emissivity profile on the geometry of the corona. Workplace Astronomical Institute Contact Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Year of Publishing 2022
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