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...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2020
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| In: |
Physics of the Dark Universe
Year: 2019, Volume: 27, Pages: 100411 |
| ISSN: | 2212-6864 |
| DOI: | 10.1016/j.dark.2019.100411 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.dark.2019.100411
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| Author Notes: | Fulvio Sbisa, Pedro O. Baqui, Tays Miranda, Sergio E. Joras and Oliver F. Piattella |
| Summary: | 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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| Item Description: | 14 Nov 2019 Gesehen am 14.04.2020 |
| Physical Description: | Online Resource |
| ISSN: | 2212-6864 |
| DOI: | 10.1016/j.dark.2019.100411 |