Neutron star masses in R-2-gravity
We address the issue of the existence of inequivalent definitions of gravitational mass in R-2-gravity. We present several definitions of gravitational mass, and discuss the formal relations between them. We then consider the concrete case of a static and spherically symmetric neutron star, and solv...
Gespeichert in:
| Hauptverfasser: | , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2020
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| In: |
Physics of the Dark Universe
Year: 2019, Jahrgang: 27, Pages: 100411 |
| ISSN: | 2212-6864 |
| DOI: | 10.1016/j.dark.2019.100411 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.dark.2019.100411
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| Verfasserangaben: | Fulvio Sbisa, Pedro O. Baqui, Tays Miranda, Sergio E. Joras and Oliver F. Piattella |
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| 520 | |a We address the issue of the existence of inequivalent definitions of gravitational mass in R-2-gravity. We present several definitions of gravitational mass, and discuss the formal relations between them. We then consider the concrete case of a static and spherically symmetric neutron star, and solve numerically the equations of motion for several values of the free parameter of the model. We compare the features of the mass-radius relations obtained for each definition of gravitational mass, and we comment on their dependence on the free parameter. We then argue that R-2-gravity is a valuable proxy to discuss the existence of inequivalent definitions of gravitational mass in a generic modified gravity theory, and present some comments on the general case. (C) 2019 Elsevier B.V. All rights reserved. | ||
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