Quasiperiodic oscillations around hairy black holes in Horndeski gravity
Abstract Testing gravity theories and their parameters using observations is an important issue in relativistic astrophysics. In this context, we investigate the motion of test particles and their harmonic oscillations in the spacetime of non-rotating hairy black holes (BHs) in Hordeski gravity, tog...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-07-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-023-11769-4 |
| _version_ | 1797689116393996288 |
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| author | Javlon Rayimbaev Konstantinos F. Dialektopoulos Furkat Sarikulov Ahmadjon Abdujabbarov |
| author_facet | Javlon Rayimbaev Konstantinos F. Dialektopoulos Furkat Sarikulov Ahmadjon Abdujabbarov |
| author_sort | Javlon Rayimbaev |
| collection | DOAJ |
| description | Abstract Testing gravity theories and their parameters using observations is an important issue in relativistic astrophysics. In this context, we investigate the motion of test particles and their harmonic oscillations in the spacetime of non-rotating hairy black holes (BHs) in Hordeski gravity, together with astrophysical applications of quasiperiodic oscillations (QPOs). We show possible values of upper and lower frequencies of twin-peak QPOs which may occur in the orbits from innermost stable circular orbits to infinity for various values of the Horndeski parameter q in relativistic precession, warped disk models, and three different sub-models of the epicyclic resonant model. We also study the behaviour of the QPO orbits and their position relative to innermost stable circular orbits (ISCOs) with respect to different values of the parameter q. It is obtained that at a critical value of the Horndeski parameter ISCO radius takes 6M which has been in the pure Schwarzschild case. Finally, we obtain mass constraints of the central BH of microquasars GRS 1915+105 and XTE 1550-564 at the GR limit and the possible value of the Horndeski parameter in the frame of the above-mentioned QPO models. The analysis of orbits of twin peak QPOs with the ratio of upper and lower frequencies 3:2, around the BHs in the frame of relativistic precession (RP) and epicyclic resonance (ER4) QPO models have shown that the orbits locate close to the ISCO. It is obtained that the distance between QPO orbits and ISCO is less than the error of the observations. |
| first_indexed | 2024-03-12T01:41:22Z |
| format | Article |
| id | doaj.art-55a0fbba7094451d8a50f509915182a6 |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-03-12T01:41:22Z |
| publishDate | 2023-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-55a0fbba7094451d8a50f509915182a62023-09-10T11:22:38ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522023-07-0183711310.1140/epjc/s10052-023-11769-4Quasiperiodic oscillations around hairy black holes in Horndeski gravityJavlon Rayimbaev0Konstantinos F. Dialektopoulos1Furkat Sarikulov2Ahmadjon Abdujabbarov3Institute of Fundamental and Applied Research, National Research University TIIAMEDepartment of Physics, Nazarbayev UniversitySchool of Mathematics and Natural Sciences, New Uzbekistan UniversityNational University of UzbekistanAbstract Testing gravity theories and their parameters using observations is an important issue in relativistic astrophysics. In this context, we investigate the motion of test particles and their harmonic oscillations in the spacetime of non-rotating hairy black holes (BHs) in Hordeski gravity, together with astrophysical applications of quasiperiodic oscillations (QPOs). We show possible values of upper and lower frequencies of twin-peak QPOs which may occur in the orbits from innermost stable circular orbits to infinity for various values of the Horndeski parameter q in relativistic precession, warped disk models, and three different sub-models of the epicyclic resonant model. We also study the behaviour of the QPO orbits and their position relative to innermost stable circular orbits (ISCOs) with respect to different values of the parameter q. It is obtained that at a critical value of the Horndeski parameter ISCO radius takes 6M which has been in the pure Schwarzschild case. Finally, we obtain mass constraints of the central BH of microquasars GRS 1915+105 and XTE 1550-564 at the GR limit and the possible value of the Horndeski parameter in the frame of the above-mentioned QPO models. The analysis of orbits of twin peak QPOs with the ratio of upper and lower frequencies 3:2, around the BHs in the frame of relativistic precession (RP) and epicyclic resonance (ER4) QPO models have shown that the orbits locate close to the ISCO. It is obtained that the distance between QPO orbits and ISCO is less than the error of the observations.https://doi.org/10.1140/epjc/s10052-023-11769-4 |
| spellingShingle | Javlon Rayimbaev Konstantinos F. Dialektopoulos Furkat Sarikulov Ahmadjon Abdujabbarov Quasiperiodic oscillations around hairy black holes in Horndeski gravity European Physical Journal C: Particles and Fields |
| title | Quasiperiodic oscillations around hairy black holes in Horndeski gravity |
| title_full | Quasiperiodic oscillations around hairy black holes in Horndeski gravity |
| title_fullStr | Quasiperiodic oscillations around hairy black holes in Horndeski gravity |
| title_full_unstemmed | Quasiperiodic oscillations around hairy black holes in Horndeski gravity |
| title_short | Quasiperiodic oscillations around hairy black holes in Horndeski gravity |
| title_sort | quasiperiodic oscillations around hairy black holes in horndeski gravity |
| url | https://doi.org/10.1140/epjc/s10052-023-11769-4 |
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