| Texto completo | |
| Autor(es): |
Rahimi, Fahimeh
;
Rezaei, Zeinab
;
Issifu, Adamu
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 112, n. 8, p. 19-pg., 2025-10-22. |
| Resumo | |
Scalar-tensor gravity models are among the prime candidates to explain cosmic acceleration, and compact stars provide unique laboratories for testing such theories. Predictions of scalar-tensor gravity in compact stars can be examined during the evolution of neutron stars. Spontaneous scalarization in relativistic stars is influenced by different properties of stellar matter in various evolution regimes. In the present study, we investigate the scalarization of neutron stars in different stages of the evolvement. For this aim, we apply the isentropic equations of state for the neutron star matter including nucleons, hyperons, and Delta-resonances in neutrino-trapped, neutrino diffusion, and neutrino-transparent stages as well as coldcatalyzed neutron star. Our equations of state are based on the relativistic model within the mean-field approximation. To emphasize the role of scalar-tensor theories in exploring the properties and structure of compact stars, we calculate the structure of neutron stars with hyperons and Delta-resonances in different snapshots of the neutron star evolution in the scalar-tensor gravity. Our calculations confirm that the neutron star scalarization is affected by the hyperons as well as the Delta-resonances. Moreover, the properties of scalarized neutron stars depend on the stage of the star evolution. (AU) | |
| Processo FAPESP: | 23/09545-1 - Efeito da matéria escura na evolução de estrelas de neutron |
| Beneficiário: | Adamu Issifu |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |