Accretion onto a static spherically symmetric regular MOG dark compact object
Abstract In astrophysics, the process of a massive body acquiring matter is referred to as accretion. The extraction of gravitational energy occurs as a result of the infall. Since it converts gravitational energy into radiation, accretion onto dark compact objects, e.g. black holes, neutron stars,...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2023-05-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-023-11620-w |
| _version_ | 1797789581917028352 |
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| author | Kourosh Nozari Sara Saghafi Fateme Aliyan |
| author_facet | Kourosh Nozari Sara Saghafi Fateme Aliyan |
| author_sort | Kourosh Nozari |
| collection | DOAJ |
| description | Abstract In astrophysics, the process of a massive body acquiring matter is referred to as accretion. The extraction of gravitational energy occurs as a result of the infall. Since it converts gravitational energy into radiation, accretion onto dark compact objects, e.g. black holes, neutron stars, and white dwarfs is an extremely significant process in the astrophysical context. Accretion process is a fruitful way to explore the features of modified gravity (MOG) theories by testing the behavior of their solutions associated with dark compact objects. In this paper, we study the motion of electrically neutral and charged particles moving in around a regular spherically symmetric MOG dark compact object to explore their related innermost stable circular orbit (ISCO) and energy flux. Then, we turn to investigate the accretion of perfect fluid onto the regular spherically symmetric MOG dark compact object. We obtain analytical expressions for four-velocity and proper energy density of the accreting fluid. We see that the MOG parameter increases the ISCO radius of either electrically neutral or charged test particles while it decreases the corresponding energy flux. Moreover, the energy density and the radial component of the four-velocity of the infalling fluid decrease by increasing the MOG parameter near the central source. |
| first_indexed | 2024-03-13T01:52:43Z |
| format | Article |
| id | doaj.art-a5c7cd2f1e6e47158ea6c91cdce9b651 |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-03-13T01:52:43Z |
| publishDate | 2023-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-a5c7cd2f1e6e47158ea6c91cdce9b6512023-07-02T11:25:02ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522023-05-0183511410.1140/epjc/s10052-023-11620-wAccretion onto a static spherically symmetric regular MOG dark compact objectKourosh Nozari0Sara Saghafi1Fateme Aliyan2Department of Theoretical Physics, Faculty of Science, University of MazandaranDepartment of Theoretical Physics, Faculty of Science, University of MazandaranDepartment of Theoretical Physics, Faculty of Science, University of MazandaranAbstract In astrophysics, the process of a massive body acquiring matter is referred to as accretion. The extraction of gravitational energy occurs as a result of the infall. Since it converts gravitational energy into radiation, accretion onto dark compact objects, e.g. black holes, neutron stars, and white dwarfs is an extremely significant process in the astrophysical context. Accretion process is a fruitful way to explore the features of modified gravity (MOG) theories by testing the behavior of their solutions associated with dark compact objects. In this paper, we study the motion of electrically neutral and charged particles moving in around a regular spherically symmetric MOG dark compact object to explore their related innermost stable circular orbit (ISCO) and energy flux. Then, we turn to investigate the accretion of perfect fluid onto the regular spherically symmetric MOG dark compact object. We obtain analytical expressions for four-velocity and proper energy density of the accreting fluid. We see that the MOG parameter increases the ISCO radius of either electrically neutral or charged test particles while it decreases the corresponding energy flux. Moreover, the energy density and the radial component of the four-velocity of the infalling fluid decrease by increasing the MOG parameter near the central source.https://doi.org/10.1140/epjc/s10052-023-11620-w |
| spellingShingle | Kourosh Nozari Sara Saghafi Fateme Aliyan Accretion onto a static spherically symmetric regular MOG dark compact object European Physical Journal C: Particles and Fields |
| title | Accretion onto a static spherically symmetric regular MOG dark compact object |
| title_full | Accretion onto a static spherically symmetric regular MOG dark compact object |
| title_fullStr | Accretion onto a static spherically symmetric regular MOG dark compact object |
| title_full_unstemmed | Accretion onto a static spherically symmetric regular MOG dark compact object |
| title_short | Accretion onto a static spherically symmetric regular MOG dark compact object |
| title_sort | accretion onto a static spherically symmetric regular mog dark compact object |
| url | https://doi.org/10.1140/epjc/s10052-023-11620-w |
| work_keys_str_mv | AT kouroshnozari accretionontoastaticsphericallysymmetricregularmogdarkcompactobject AT sarasaghafi accretionontoastaticsphericallysymmetricregularmogdarkcompactobject AT fatemealiyan accretionontoastaticsphericallysymmetricregularmogdarkcompactobject |