Constraints on metric-affine gravity black holes from the stellar motion at the Galactic Center
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
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2023
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| author | De Martino, Ivan Della Monica, Riccardo Rubiera-Garcia, Diego |
| author_facet | De Martino, Ivan Della Monica, Riccardo Rubiera-Garcia, Diego |
| contents | We consider a static, spherically symmetric space-time with an electric field arising from a quadratic metric-affine extension of General Relativity. Such a space-time is free of singularities in the centre of the black holes, while at large distances it quickly boils down to the usual Reissner-Nordström solution. We probe this space-time metric, which is uniquely characterized by two length scales, $r_q$ and $\ell$, using the astrometric and spectroscopic measurements of the orbital motion of the S2 star around the Galactic Center. Our analysis constrains $r_q$ to be below $2.7M$ for values $\ell<120 AU$, strongly favouring a central object that resembles a Schwarzschild black hole. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_08031 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Constraints on metric-affine gravity black holes from the stellar motion at the Galactic Center De Martino, Ivan Della Monica, Riccardo Rubiera-Garcia, Diego General Relativity and Quantum Cosmology Astrophysics of Galaxies We consider a static, spherically symmetric space-time with an electric field arising from a quadratic metric-affine extension of General Relativity. Such a space-time is free of singularities in the centre of the black holes, while at large distances it quickly boils down to the usual Reissner-Nordström solution. We probe this space-time metric, which is uniquely characterized by two length scales, $r_q$ and $\ell$, using the astrometric and spectroscopic measurements of the orbital motion of the S2 star around the Galactic Center. Our analysis constrains $r_q$ to be below $2.7M$ for values $\ell<120 AU$, strongly favouring a central object that resembles a Schwarzschild black hole. |
| title | Constraints on metric-affine gravity black holes from the stellar motion at the Galactic Center |
| topic | General Relativity and Quantum Cosmology Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2311.08031 |