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题名: Neutron star properties in density-dependent relativistic Hartree-Fock theory
作者: Sun, Bao Yuan ;  Long, Wen Hui ;  Meng, Jie ;  Lombardo, U.
刊名: PHYSICAL REVIEW C
出版日期: 2008
卷号: 78, 期号:6, 页码:-
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
学科分类: Physics
通讯作者: Sun, BY , Peking Univ, Sch Phys, Beijing 100871, Peoples R China
部门归属: [Sun, BY; Long, WH; Meng, J] Peking Univ, Sch Phys, Beijing 100871, Peoples R China; [Long, WH] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany; [Meng, J] Univ Stellenbosch, Dept Phys, ZA-7600 Stellenbosch, South Africa; [Meng, J] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; [Meng, J] Natl Lab Heavy Ion Accelertor, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China; [Lombardo, U] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95123 Catania, Italy; [Lombardo, U] Univ Catania, Dipartimento Fis & Astron, I-95125 Catania, Italy; [Sun, BY; Long, WH; Meng, J] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
英文摘要: 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.
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]
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000262248100065
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5423
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
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):-.
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