Neutron star equations of state with optical potential constraint

被引：7

作者：

Antic, S. ^{[1
,2
]}

Typel, S. ^{[1
]}

机构：

[1] GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany

[2] Tech Univ Darmstadt, D-64289 Darmstadt, Germany

来源：

NUCLEAR PHYSICS A | 2015年 / 938卷

关键词：

Relativistic mean-field model; Equation of state; Neutron stars; Density-dependent coupling; Derivative coupling; Optical potential; MEAN-FIELD DYNAMICS; NUCLEAR-MATTER; SCATTERING;

D O I：

10.1016/j.nuclphysa.2015.03.004

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Nuclear matter and neutron stars are studied in the framework of an extended relativistic mean-field (RMF) model with higher-order derivative and density dependent couplings of nucleons to the meson fields. The derivative couplings lead to an energy dependence of the scalar and vector self-energies of the nucleons. It can be adjusted to be consistent with experimental results for the optical potential in nuclear matter. Several parametrization, which give identical predictions for the saturation properties of nuclear matter, are presented for different forms of the derivative coupling functions. The stellar structure of spherical, non-rotating stars is calculated for these new equations of state (EoS). A substantial softening of the EoS and a reduction of the maximum mass of neutron stars is found if the optical potential constraint is satisfied. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：92 / 108

页数：17

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