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Sun, Bao Yuan; Long, Wen Hui; Meng, Jie; Lombardo, U.; Sun, BY , Peking Univ, Sch Phys, Beijing 100871, Peoples R China
Neutron star properties in density-dependent relativistic Hartree-Fock theory
发表期刊PHYSICAL REVIEW C
关键词Mean-field Theory Asymmetric Nuclear-matter Nonlinear Sigma-term Heavy-ion Reactions Ground-state Bogoliubov Theory Recent Progress Shell Structure Exotic Nuclei Finite Nuclei
摘要With the equations of state provided by the newly developed density-dependent relativistic Hartree-Fock (DDRHF) theory for hadronic matter, the properties of the static and beta-equilibrium neutron stars without hyperons are studied for the first time and compared to the predictions of the relativistic mean-field models and recent observational data. The influences of Fock terms on properties of asymmetric nuclear matter at high densities are discussed in detail. Because of the significant contributions from the sigma- and omega-exchange terms to the symmetry energy, large proton fractions in neutron stars are predicted by the DDRHF calculations, which strongly affect the cooling process of the star. A critical mass of about 1.45M(circle dot), close to the limit of 1.5M(circle dot) determined by modern soft X-ray data analysis, is obtained by DDRHF with the effective interactions PKO2 and PKO3 for the occurrence of the direct Urca process in neutron stars. The maximum masses of neutron stars given by the DDRHF calculations lie between 2.45M(circle dot) and 2.49M(circle dot), which are in reasonable agreement with the high pulsar mass of (2.08 +/- 0.19)M(circle dot) from PSR B1516 + 02B. It is also found that the mass-radius relations of neutron stars determined by DDRHF are consistent with the observational data from thermal radiation measurements in the isolated neutron star RX J1856, quasiperiodic brightness oscillations in the low-mass X-ray binaries 4U 0614 + 09 and 4U 1636-536, and the redshift determined in the low-mass X-ray binary EXO 0748-676.
2008
ISSN0556-2813
卷号78期号:6页码:-
学科领域Physics
收录类别SCI
项目资助者Major State Basic Research Development Program[2007CB815000]; National Natural Science Foundation of China[10435010, 10775004, 10221003]; Asia-Europe Link Program in Nuclear Physics and Astrophysics[CN/ASIA-LINK/008094-791] ; Major State Basic Research Development Program[2007CB815000]; National Natural Science Foundation of China[10435010, 10775004, 10221003]; Asia-Europe Link Program in Nuclear Physics and Astrophysics[CN/ASIA-LINK/008094-791] ; Major State Basic Research Development Program[2007CB815000]; National Natural Science Foundation of China[10435010, 10775004, 10221003]; Asia-Europe Link Program in Nuclear Physics and Astrophysics[CN/ASIA-LINK/008094-791] ; Major State Basic Research Development Program[2007CB815000]; National Natural Science Foundation of China[10435010, 10775004, 10221003]; Asia-Europe Link Program in Nuclear Physics and Astrophysics[CN/ASIA-LINK/008094-791]
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被引频次:37[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5423
专题理论物理所科研产出_SCI论文
通讯作者Sun, BY , Peking Univ, Sch Phys, Beijing 100871, Peoples R China
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Sun, Bao Yuan,Long, Wen Hui,Meng, Jie,et al. Neutron star properties in density-dependent relativistic Hartree-Fock theory[J]. PHYSICAL REVIEW C,2008,78(6):-.
APA Sun, Bao Yuan,Long, Wen Hui,Meng, Jie,Lombardo, U.,&Sun, BY , Peking Univ, Sch Phys, Beijing 100871, Peoples R China.(2008).Neutron star properties in density-dependent relativistic Hartree-Fock theory.PHYSICAL REVIEW C,78(6),-.
MLA Sun, Bao Yuan,et al."Neutron star properties in density-dependent relativistic Hartree-Fock theory".PHYSICAL REVIEW C 78.6(2008):-.
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