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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2412.13568 |
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| _version_ | 1866916529683038208 |
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| author | Pretel, Juan M. Z. Dutra, Mariana Duarte, Sergio B. |
| author_facet | Pretel, Juan M. Z. Dutra, Mariana Duarte, Sergio B. |
| contents | We analyze the effect of a Chaplygin dark fluid (CDF) core on neutron stars (NSs). To address this study, we focus on the relativistic structure of stellar configurations composed by a dark-energy core, described by a Chaplygin-like equation of state (EoS), and an ordinary-matter crust which is described by a polytropic EoS. We examine the impact of the rate of energy densities at the discontinuous surface, defined as $α= ρ_{\rm dis}^-/ρ_{\rm dis}^+$, on the radius, total gravitational mass, oscillation spectrum and tidal deformability. Furthermore, we compare our theoretical predictions with several observational mass-radius measurements and tidal deformability constraints. These comparisons together with the radial stability analysis show that the existence of NSs with a dark-energy core is possible. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_13568 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Neutron stars with a dark-energy core from the Chaplygin gas Pretel, Juan M. Z. Dutra, Mariana Duarte, Sergio B. General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena We analyze the effect of a Chaplygin dark fluid (CDF) core on neutron stars (NSs). To address this study, we focus on the relativistic structure of stellar configurations composed by a dark-energy core, described by a Chaplygin-like equation of state (EoS), and an ordinary-matter crust which is described by a polytropic EoS. We examine the impact of the rate of energy densities at the discontinuous surface, defined as $α= ρ_{\rm dis}^-/ρ_{\rm dis}^+$, on the radius, total gravitational mass, oscillation spectrum and tidal deformability. Furthermore, we compare our theoretical predictions with several observational mass-radius measurements and tidal deformability constraints. These comparisons together with the radial stability analysis show that the existence of NSs with a dark-energy core is possible. |
| title | Neutron stars with a dark-energy core from the Chaplygin gas |
| topic | General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2412.13568 |