STUCHLÍK, Zdeněk and Jaroslav VRBA. Geodesic Model of HF QPOs Tested for Black Holes in Spacetimes Reflecting the Effect of Surrounding Dark Matter. Astrophysical Journal. GB - Spojené království Velké Británie a, 2022, vol. 935, No 2, p. "91-1"-"91-31", 31 pp. ISSN 0004-637X. Available from: https://dx.doi.org/10.3847/1538-4357/ac7f27.
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Basic information
Original name Geodesic Model of HF QPOs Tested for Black Holes in Spacetimes Reflecting the Effect of Surrounding Dark Matter
Authors STUCHLÍK, Zdeněk (203 Czech Republic, belonging to the institution) and Jaroslav VRBA (203 Czech Republic, belonging to the institution).
Edition Astrophysical Journal, GB - Spojené království Velké Británie a, 2022, 0004-637X.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10308 Astronomy
Country of publisher United Kingdom of Great Britain and Northern Ireland
Confidentiality degree is not subject to a state or trade secret
WWW URL
RIV identification code RIV/47813059:19630/22:A0000180
Organization unit Institute of physics in Opava
Doi http://dx.doi.org/10.3847/1538-4357/ac7f27
UT WoS 000841985400001
Keywords in English quasi-periodic oscillations;cosmological constant;naked singularities;geodesic motion;Keplerian accretion disks
Tags FÚ, RIV23
Links GA19-03950S, research and development project.
Changed by Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 30/1/2023 13:45.
Abstract
Using the simple but robust model of a shell of dark matter (DM) around a Schwarzschild black hole (BH), represented by the mass ratio of the shell and BH Delta M/M, the shell extension Delta r (s) and its inner radius r (s), we study the influence of DM on the spacetime structure and geodesic motion, and provide a classification of the BH+DM shell spacetimes according to the properties of the stable circular geodesics governing Keplerian disks. We focus our attention on the epicyclic motion around circular geodesics that can be related to observational phenomena in X-ray radiation from Keplerian accretion disks, assumed to be influenced by the DM shell only gravitationally. We give the frequencies of the orbital and epicyclic motions and discuss their properties in terms of the parameters governing the DM shell. Using the frequencies in relevant variants of the standard geodesic model of high-frequency quasiperiodic oscillations (HF QPOs), we test the role of DM by fitting the HF QPO data from some microquasars and active galactic nuclei with supermassive BHs where no variant of the geodesic model applied in the standard vacuum BH background is able to explain the data. We thus provide a robust review of the applicability of the geodesic model of HF QPOs, and also provide limits on the amount of DM around a BH. We demonstrate that the geodesic model could be well applied to most observations of active galactic nuclei, with strong restrictions on the amount of invisible matter around BHs.
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