Utilize este identificador para referenciar este registo:
http://hdl.handle.net/10773/36471
Título: | Compact elastic objects in general relativity |
Autor: | Alho, Artur Natário, José Pani, Paolo Raposo, Guilherme |
Data: | 15-Fev-2022 |
Editora: | American Physical Society |
Resumo: | We introduce a rigorous and general framework to study systematically self-gravitating elastic materials within general relativity, and apply it to investigate the existence and viability, including radial stability, of spherically symmetric elastic stars. We present the mass-radius ($M-R$) diagram for various families of models, showing that elasticity contributes to increase the maximum mass and the compactness up to $\approx 22\%$, thus supporting compact stars with mass well above two solar masses. Some of these elastic stars can reach compactness as high as $GM/(c^2R)\approx 0.35$ while remaining stable under radial perturbations and satisfying all energy conditions and subluminal wave propagation, thus being physically realizable models of stars with a light ring. We provide numerical evidence that radial instability occurs for central densities larger than that corresponding to the maximum mass, as in the perfect-fluid case. Elasticity may be a key ingredient to build consistent models of exotic ultracompact objects and black-hole mimickers, and can also be relevant for a more accurate modelling of the interior of neutron stars. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/36471 |
DOI: | 10.1103/PhysRevD.105.044025 |
ISSN: | 2470-0010 |
Aparece nas coleções: | CIDMA - Artigos GGDG - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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LG19185.pdf | 492.27 kB | Adobe PDF | Ver/Abrir |
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