Neutron stars with a dark-energy core from the Chaplygin gas
| Autor: | Pretel, Juan M. Z., Dutra, Mariana, Duarte, Sergio B. |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | 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 $\alpha= \rho_{\rm dis}^-/\rho_{\rm dis}^+$, 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. Comment: 12 pages, 7 figures. Accepted to appear in the Proceedings of the 17th Marcel Grossmann Meeting (MG17)/Pescara, Italy, 7-12 July 2024 |
| Databáze: | arXiv |
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