Reinvestigation of the electron fraction and electron Fermi energy of neutron star
文献类型：期刊论文
| 作者 | Gao, Z. F.1,2; Shan, H.1; Wang, W.3; Wang, N.1 |
| 刊名 | ASTRONOMISCHE NACHRICHTEN
 |
| 出版日期 | 2017-12-01 |
| 卷号 | 338期号:9-10页码:1066-1072 |
| 关键词 | electron Fermi energy equation of state neutron star |
| ISSN号 | 0004-6337 |
| DOI | 10.1002/asna.201713437 |
| 通讯作者 | Gao, Z. F.(zhifugao@xao.ac.cn) ; Wang, N.(na.wang@xao.ac.cn) |
| 英文摘要 | 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. |
| WOS关键词 | SUPERHIGH MAGNETIC-FIELDS ; EQUATION-OF-STATE ; MATTER ; EVOLUTION ; EMISSION ; MASSES |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000418755700020 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/22511]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Gao, Z. F.; Wang, N. |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：紫金山天文台
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