The Nucleon Direct Urca Processes in a Cooling Neutron Star

	The Nucleon Direct Urca Processes in a Cooling Neutron Star
	Xu Y(许妍) ; Liu GZ(刘广洲) ; Liu CZ(刘承志) ; Fan CB(范存波) ; Wang HY(王红岩) ; Zhu MF(朱明枫) ; Zhao EG(赵恩广)
刊名	Chinese physics letters
	2013
期号	12
合作状况	国内
中文摘要	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 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 mesons appear in a neutron star or not. However, the presence of mesons can result in obvious growth in the neutrino emissivity and luminosity which will speed up the cooling rate for the nonsuperfluid neutron star.
收录类别	SCI
公开日期	2014-01-08
内容类型	期刊论文
源URL	[http://210.72.87.206/handle/60510005-5/79]
专题	长春人造卫星观测站_卫星轨道理论研究室_期刊论文
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(12).
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(12).
MLA	Xu Y,et al."The Nucleon Direct Urca Processes in a Cooling Neutron Star".Chinese physics letters .12(2013).