The Nucleon Direct Urca Processes in a Cooling Neutron Star

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	The Nucleon Direct Urca Processes in a Cooling Neutron Star
	Xu, Y ; Liu, GZ ; Liu, CZ ; Fan, CB ; Wang, HY ; Zhu, MF ; Zhao, EG
刊名	CHINESE PHYSICS LETTERS
	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
ISSN号	0256-307X
通讯作者	Liu, CZ (reprint author), Chinese Acad Sci, Natl Astron Observ, Changchun Observ, Changchun 130117, 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.
学科主题	Physics
收录类别	SCI
资助信息	National Natural Science Foundation of China [11075063, 11073033, 11247312, 11103047]
原文出处	http://dx.doi.org/10.1088/0256-307X/30/12/129501
语种	英语
WOS记录号	WOS:000329283000047
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15218]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	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.
APA	Xu, Y.,Liu, GZ.,Liu, CZ.,Fan, CB.,Wang, HY.,...&Zhao, EG.(2013).The Nucleon Direct Urca Processes in a Cooling Neutron Star.CHINESE PHYSICS LETTERS,30(12),129501.
MLA	Xu, Y,et al."The Nucleon Direct Urca Processes in a Cooling Neutron Star".CHINESE PHYSICS LETTERS 30.12(2013):129501.