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题名: The Nucleon Direct Urca Processes in a Cooling Neutron Star
作者: Xu, Y ;  Liu, GZ ;  Liu, CZ ;  Fan, CB ;  Wang, HY ;  Zhu, MF ;  Zhao, EG
刊名: CHINESE PHYSICS LETTERS
出版日期: 2013
卷号: 30, 期号:12, 页码:129501
关键词: HYPERON-HYPERON INTERACTIONS ;  ISOVECTOR SCALAR MESON ;  MEAN-FIELD THEORY ;  MATTER ;  CONDENSATION ;  HYPERNUCLEI
学科分类: Physics
通讯作者: Liu, CZ (reprint author), Chinese Acad Sci, Natl Astron Observ, Changchun Observ, Changchun 130117, Peoples R China.
部门归属: [Xu Yan; Liu Cheng-Zhi; Fan Cun-Bo] Chinese Acad Sci, Natl Astron Observ, Changchun Observ, Changchun 130117, Peoples R China; [Liu Guang-Zhou; Zhu Ming-Feng] Jilin Univ, Ctr Theoret Phys, Changchun 130012, Peoples R China; [Wang Hong-Yan] Beihua Univ, Coll Phys, Jilin 132013, Jilin, Peoples R China; [Zhao En-Guang] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
英文摘要: In the relativistic mean field approximation, the relativistic energy losses of the nucleon direct Urca processes are studied in the degenerate baryon matter of neutron stars. We investigate the effects of hyperon degrees of freedom and the isovector scalar interaction which is considered by exchanging delta meson on the nucleon direct Urca processes in neutron star matter. The results indicate that the existence of hyperons decreases the abundance of protons and leptons and can sharply suppress the neutrino emissivity of the nucleon direct Urca processes, while it has only a little influence on the neutrino luminosity for a fixed neutron star whether delta mesons appear in a neutron star or not. However, the presence of delta mesons can result in obvious growth in the neutrino emissivity and luminosity which will speed up the cooling rate for the nonsuperfluid neutron star.
资助者: National Natural Science Foundation of China [11075063, 11073033, 11247312, 11103047]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000329283000047
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15218
Appears in Collections:理论物理所2013年知识产出 _期刊论文

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Recommended Citation:
Xu, Y,Liu, GZ,Liu, CZ,et al. The Nucleon Direct Urca Processes in a Cooling Neutron Star[J]. CHINESE PHYSICS LETTERS,2013,30(12):129501.
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