| Texto completo | |
| Autor(es): |
Dutra, Mariana
;
Lourenco, Odilon
;
Menezes, Debora P.
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW C; v. 93, n. 2, p. 7-pg., 2016-02-16. |
| Resumo | |
We analyze the stellar properties of the relativistic mean-field (RMF) parametrizations shown to be consistent with the recently studied constraints related to nuclear matter, pure neutron matter, symmetry energy, and its derivatives [Phys. Rev. C 90, 055203 (2014)]. Our results show that only two RMF parametrizations do not allow the emergence of the direct Urca process, important aspect regarding the evolution of a neutron star. Moreover, among all approved RMF models, fourteen of them produce neutron stars with maximum masses inside the range 1.93 <= M/M-circle dot <= 2.05, with M-circle dot being the solar mass. Only three models yield maximum masses above this range and a discussion on the inclusion of hyperons is presented. Finally, we verified that the models satisfying the neutron star maximum mass constraint do not observe the squared sound velocity bound; namely, v(s)(2) < 1/3, corroborating recent findings. However, the recently proposed sigma-cut scheme can make the RMF models consistent with both constraints, depending on the isoscalar-vector interaction of each parametrization. (AU) | |
| Processo FAPESP: | 13/26258-4 - Matéria superdensa no universo |
| Beneficiário: | Manuel Máximo Bastos Malheiro de Oliveira |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |