XAO OpenIR  > 射电天文研究室  > 脉冲星研究团组
Reinvestigation of the electron fraction and electron Fermi energy of neutron star
Gao, Z. F.1,2; Shan, H.1; Wang, W.3; Wang, N.1
2017-12-01
Source PublicationASTRONOMISCHE NACHRICHTEN
ISSN0004-6337
Volume338Issue:9-10Pages:1066-1072
Contribution Rank1
Abstract

In this work, we reinvestigate the electron fraction Y-e and electron Fermi energy E-F(e) of neutron stars, based on our previous work, in which we first deduce a special solution to E-F(e), and then obtain several useful analytical formulae for Y-e and matter density within classical models and the relativistic mean-field (RMF) theory using numerical fitting. The advantages of this formalism include the following: (a) Linear functions are substituted for the nonlinear exponential functions used in the previous work. This method may be simpler and closer to realistic equation of state (EoS) of a neutron star (NS) because there are linear or quasi-linear relationships between number fractions of leptons and matter density, which can be seen by solving NS EoS. (b) We introduce a dimensionless variable rho (rho = rho/rho(0), rho(0) is the standard saturated nuclear density), which greatly reduces the scope of the fitting coefficients. (c) We present numerical errors including absolute and relative deviations between the data and fit. By numerical simulations, we obtain several analytical formulae for Y-e and rho for both APR98 and RMF models. Combining these analytical formulae with the special solution, we can calculate the value of E-F(e) for any given matter density. Since Y-e and E-F(e) are important in assessing the cooling rate of an NS and the possibility of kaon/pion condensation in the NS's interior, this formalism could be useful in the future studies on the thermal evolution of an NS.

Correspondent Emailzhifugao@xao.ac.cn; na.wang@xao.ac.cn
KeywordElectron Fermi Energy Equation Of State Neutron Star
SubtypeArticle
DOI10.1002/asna.201713437
WOS HeadingsScience & Technology ; Physical Sciences
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSuperhigh Magnetic-fields ; Equation-of-state ; Matter ; Evolution ; Emission ; Masses
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000418755700020
Funding OrganizationNational Basic Research Program of China(2015CB857100) ; West Light Foundation of CAS(XBBS-2014-23, XBBS-2014-22, 2172201302) ; Chinese National Science Foundation(11673056, 11273051, 11373006, 11133001, 11173042) ; Strategic Priority Research Program of CAS(XDB23000000) ; National Program on Key Research and Development Project(2016YFA0400803)
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/1818
Collection射电天文研究室_脉冲星研究团组
射电天文研究室
计算机技术应用研究室
其它
Corresponding AuthorGao, Z. F.
Affiliation1.Chinese Acad Sci, Xinjiang Astron Observ, 150,Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing, Jiangsu, Peoples R China
3.Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Hubei, Peoples R China
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Gao, Z. F.,Shan, H.,Wang, W.,et al. Reinvestigation of the electron fraction and electron Fermi energy of neutron star[J]. ASTRONOMISCHE NACHRICHTEN,2017,338(9-10):1066-1072.
APA Gao, Z. F.,Shan, H.,Wang, W.,&Wang, N..(2017).Reinvestigation of the electron fraction and electron Fermi energy of neutron star.ASTRONOMISCHE NACHRICHTEN,338(9-10),1066-1072.
MLA Gao, Z. F.,et al."Reinvestigation of the electron fraction and electron Fermi energy of neutron star".ASTRONOMISCHE NACHRICHTEN 338.9-10(2017):1066-1072.
Files in This Item:
File Name/Size DocType Version Access License
2017-Gao-Reinvestiga(733KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Gao, Z. F.]'s Articles
[Shan, H.]'s Articles
[Wang, W.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Gao, Z. F.]'s Articles
[Shan, H.]'s Articles
[Wang, W.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Gao, Z. F.]'s Articles
[Shan, H.]'s Articles
[Wang, W.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2017-Gao-Reinvestigation of the electron fract.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.