KOTRLOVÁ, Andrea, Zdeněk STUCHLÍK and Gabriel TÖRÖK. Multi-Resonance Orbital Model Applied to High-Frequency Quasi-Periodic Oscillations Observed in Sgr A*. Acta Astronomica. PL - Polská republika, 2013, vol. 63, No 2, p. 275-292. ISSN 0001-5237.
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Basic information
Original name Multi-Resonance Orbital Model Applied to High-Frequency Quasi-Periodic Oscillations Observed in Sgr A*
Authors KOTRLOVÁ, Andrea, Zdeněk STUCHLÍK and Gabriel TÖRÖK.
Edition Acta Astronomica, PL - Polská republika, 2013, 0001-5237.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10308 Astronomy
Confidentiality degree is not subject to a state or trade secret
Organization unit Faculty of Philosophy and Science in Opava
UT WoS 000323396300009
Keywords in English Accretion; accretion disks; X-rays: general; Black hole physics; X-rays: individuals: Sgr A*
Tags FÚ, GA202-090772
Tags International impact, Reviewed
Links GA202/09/0772, research and development project.
Changed by Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 7/4/2021 15:10.
Abstract
The multi-resonance orbital model of high-frequency quasi-periodic oscillations (HF QPOs) enables precise determination of the black hole dimensionless spin a if observed set of oscillations demonstrates three (or more) commensurable frequencies. The black hole spin a is related to the frequency ratio only, while its mass M is related to the frequency magnitude. The model is applied to the triple frequency set of HF QPOs observed in Sgr A* source with frequency ratio 3 : 2: 1. Acceptable versions of themulti-resonance model are determined by the restrictions on the Sgr A* supermassive black hole mass. The version of strong resonances related to the black hole "magic" spin a = 0.983 is acceptable but the version demonstrating the best agreement with the mass restrictions predicts spin a = 0.980.
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