Spontaneous scalarization in proto-neutron stars

被引：1
作者：
Rahimi, Fahimeh [1 ,2 ]
Rezaei, Zeinab [1 ,2 ]
机构：
[1] Shiraz Univ, Sch Sci, Dept Phys, Shiraz 71454, Iran
[2] Shiraz Univ, Sch Sci, Biruni Observ, Shiraz 71454, Iran
来源：
EUROPEAN PHYSICAL JOURNAL C | 2023年 / 83卷 / 04期
关键词：
PROTONEUTRON STARS; NUCLEAR-MATTER; MASS; SUPERNOVA; EVOLUTION; WINDS;
D O I：
10.1140/epjc/s10052-023-11443-9
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
Proto-neutron stars are born when a highly evolved and massive star collapses under gravity. In this paper, we investigate the spontaneous scalarization in protoneutron stars. Based on the scalar tensor theory of gravity as well as the physical conditions in proto-neutron star, we examine the structure of proto-neutron star. To describe the fluid in proto-neutron star, we utilize SU(2) chiral sigma model and the finite temperature extension of the Brueckner-Bethe-Goldstone quantum many-body theory in the Brueckner-Hartree-Fock approximation. Here, we apply the equation of state of proto-neutron stars considering different cases i.e. hot pure neutron matter and hot beta-stable neutron star matter without neutrino trapping as well as with neutrino trapping. The effects of temperature and entropy of proto-neutron stars on the star structure are also studied. Our results confirm that the spontaneous scalarization is affected by different physical conditions in proto-neutron stars.
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页数：10
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