STUCHLÍK, Zdeněk and Jaroslav VRBA. Supermassive black holes surrounded by dark matter modeled as anisotropic fluid: epicyclic oscillations and their fitting to observed QPOs. Journal of Cosmology and Astroparticle Physics. GB - Spojené království Velké Británie a, 2021, vol. 2021, No 11, p. "059-1"-"059-19", 19 pp. ISSN 1475-7516. Available from: https://dx.doi.org/10.1088/1475-7516/2021/11/059.
Other formats:   BibTeX LaTeX RIS
Basic information
Original name Supermassive black holes surrounded by dark matter modeled as anisotropic fluid: epicyclic oscillations and their fitting to observed QPOs
Authors STUCHLÍK, Zdeněk (203 Czech Republic, belonging to the institution) and Jaroslav VRBA (203 Czech Republic, belonging to the institution).
Edition Journal of Cosmology and Astroparticle Physics, GB - Spojené království Velké Británie a, 2021, 1475-7516.
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/47813059:19630/21:A0000106
Organization unit Institute of physics in Opava
Doi http://dx.doi.org/10.1088/1475-7516/2021/11/059
UT WoS 000727723700002
Keywords in English dark matter simulations;astrophysical black holes
Tags 2022, FÚ, GA19-03950S, RIV22
Tags International impact, Reviewed
Links GA19-03950S, research and development project.
Changed by Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 28/3/2022 12:10.
Abstract
Recently introduced exact solution of the Einstein gravity coupled minimally to an anisotropic fluid representing dark matter can well represent supermassive black holes in galactic nuclei with realistic distribution of dark matter around the black hole, given by the Hernquist-like density distribution. For these fluid-hairy black hole spacetimes, properties of the gravitational radiation, quasinormal ringing, and optical phenomena were studied, giving interesting results. Here, using the range of physical parameters of these spacetimes allowing for their relevance in astrophysics, we study the epicyclic oscillatory motion of test particles in these spacetimes. The frequencies of the orbital and epicyclic motion are applied in the epicyclic resonance variant of the geodesic model of quasiperiodic oscillations (QPOs) observed in active galactic nuclei to demonstrate the possibility to solve the cases where the standard vacuum black hole spacetimes are not allowing for explanation of the observed data. We demonstrate that the geodesic model can explain the QPOs observed in most of the active galactic nuclei for the fluid-hairy black holes with reasonable halo parameters.
PrintDisplayed: 21/5/2024 05:16