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Xu, Y; Liu, GZ; Liu, CZ; Fan, CB; Wang, HY; Zhu, MF; Zhao, EG; Liu, CZ (reprint author), Chinese Acad Sci, Natl Astron Observ, Changchun Observ, Changchun 130117, Peoples R China.
The Nucleon Direct Urca Processes in a Cooling Neutron Star
Source PublicationCHINESE PHYSICS LETTERS
Language英语
KeywordHyperon-hyperon Interactions Isovector Scalar Meson Mean-field Theory Matter Condensation Hypernuclei
AbstractIn 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.
2013
ISSN0256-307X
Volume30Issue:12Pages:129501
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNational Natural Science Foundation of China [11075063, 11073033, 11247312, 11103047] ; National Natural Science Foundation of China [11075063, 11073033, 11247312, 11103047] ; National Natural Science Foundation of China [11075063, 11073033, 11247312, 11103047] ; National Natural Science Foundation of China [11075063, 11073033, 11247312, 11103047]
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Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/15218
Collection理论物理所科研产出_SCI期刊论文
Corresponding AuthorLiu, CZ (reprint author), Chinese Acad Sci, Natl Astron Observ, Changchun Observ, Changchun 130117, Peoples R China.
Recommended Citation
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.,...&Liu, CZ .(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.
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