Bootstrapped Newtonian stars and black holes
| Autor: | Michele Lenzi, Roberto Casadio, Octavian Micu |
|---|---|
| Přispěvatelé: | Casadio, Roberto, Lenzi, Michele, Micu, Octavian |
| Rok vydání: | 2019 |
| Předmět: |
High Energy Physics - Theory
Physics Physics and Astronomy (miscellaneous) Black hole General relativity FOS: Physical sciences lcsh:Astrophysics Escape velocity General Relativity and Quantum Cosmology (gr-qc) General Relativity and Quantum Cosmology Gravitation Arbitrarily large Stars Gravitational potential Compact space Classical mechanics High Energy Physics - Theory (hep-th) beyond Einstein gravity compact object lcsh:QB460-466 Newtonian fluid lcsh:QC770-798 lcsh:Nuclear and particle physics. Atomic energy. Radioactivity Engineering (miscellaneous) |
| Zdroj: | European Physical Journal C: Particles and Fields, Vol 79, Iss 11, Pp 1-18 (2019) European Physical Journal |
| DOI: | 10.48550/arxiv.1904.06752 |
| Popis: | We study equilibrium configurations of a homogenous ball of matter in a bootstrapped description of gravity which includes a gravitational self-interaction term beyond the Newtonian coupling. Both matter density and pressure are accounted for as sources of the gravitational potential for test particles. Unlike the general relativistic case, no Buchdahl limit is found and the pressure can in principle support a star of arbitrarily large compactness. By defining the horizon as the location where the escape velocity of test particles equals the speed of light, like in Newtonian gravity, we find a minimum value of the compactness for which this occurs. The solutions for the gravitational potential here found could effectively describe the interior of macroscopic black holes in the quantum theory, as well as predict consequent deviations from general relativity in the strong field regime of very compact objects. Comment: 27 pages, 17 figures. Version accepted for publication in EPJ C |
| Databáze: | OpenAIRE |
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