Reinvestigation of the electron fraction and electron Fermi energy of neutron star
Reinvestigation of the electron fraction and electron Fermi energy of neutron star
复制标题
中子星电子分数和电子费米能的再研究
DOI:
10.1002/asna.201713437
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发表时间:
2017-09
影响因子:
0.9
通讯作者:
H. Shan
中科院分区:
文献类型:
--
作者:
Z. F. Gao;H. Shan
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 of Li et al.(2016), in which we firstly deduced a special solution to $E_{F}(e)$, and then obtained several useful analytical formulae for $Y_{\rm e}$ and matter density $\rho$ within classical models and the relativistic mean field(RMF) theory using numerically fitting. The advantages of this work include the following aspects:(1) The linear functions are substituted for the nonlinear exponential functions used in the previous work. This method may be more simple, 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; (2)we introduce a dimensionless variable $\varrho$\,($\varrho=\rho/\rho_0$, $\rho_{0}$ is the standard saturated nuclear density), which greatly reduces the scope of the fitting coefficients;(3)we present numerical errors including absolute and relative deviations between the data and fit. By numerically simulating, we have obtained 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 $E_{\rm F}(e)$ for any given matter density. Since $Y_e$ and $E_{ F}(e)$ are important in assessing cooling rate of a NS and the possibility of kaon/pion condensation in the NS interior, this study could be useful in the future study on the thermal evolution of a NS.
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影响因子:
1.4
作者:
Zhu Cui;Gao Zhi Fu;Li Xiang Dong;Wang Na;Yuan Jian Ping;Peng Qiu He
通讯作者:
Peng Qiu He
DOI:
10.3847/1538-4357/aa880c
发表时间:
2017-09
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Xueling Mu;H. Jia;Xia Zhou;Hui Wang
通讯作者:
Xueling Mu;H. Jia;Xia Zhou;Hui Wang
影响因子:
1.9
作者:
Z. F. Gao;N. Wang;D. Song;J. Yuan;C. Chou
通讯作者:
Z. F. Gao;N. Wang;D. Song;J. Yuan;C. Chou
影响因子:
1.9
作者:
Z. F. Gao;Z. F. Gao;Na Wang;J. Yuan;L. Jiang;D. Song;E. Qiao
通讯作者:
Z. F. Gao;Z. F. Gao;Na Wang;J. Yuan;L. Jiang;D. Song;E. Qiao
影响因子:
4.8
作者:
Cheng Quan;Yu Yun-Wei;Zheng Xiao-Ping
通讯作者:
Zheng Xiao-Ping