1 Introduction
2 Relativistic Mean Field Theory
3 Limitation Model and Potential Well Depth Model
Table 1 The nucleon coupling parameter sets GL85. |
![]() |
3.1 Limitation Model
Fig. 1 (Color online) Mass-central density relation of a neutron star for different $x_{\omega}$, which corresponds to $x_{\sigma}=0.3$ and $x_{\rho\Lambda}=0$, $x_{\rho\Sigma}=2$, $x_{\rho\Xi}=1$. |
Fig. 2 Mass-central density relation of a neutron star for different $x_{\omega}$,which corresponds to $x_{\sigma}=0.4,0.5,0.6,0.7$ and $x_{\rho\Lambda}=0,x_{\rho\Sigma}=2, x_{\rho\Xi}=1$. |
Fig. 3 (Color online) Mass-central density relation of a neutron star for different $x_{\omega}$,which corresponds to $x_{\sigma}=0.8,0.9$ and $x_{\rho\Lambda}=0, x_{\rho\Sigma}=2,x_{\rho\Xi}=1$. |
Table 2 The practicable hyperon coupling parameter sets for studying massive neutron stars. |
![]() |
3.2 Potential Well Depth Model
Table 3 The value of x_ and x! are depending on the available hyper-nuclear experimental data. |
![]() |
Table 4 Twenty-five combinations of hyperon coupling parameter sets are depending on the available hyper-nuclear experimental data from Table 3. |
![]() |
Fig. 4 (Color online)The maximum neutron-star mass given by the twenty-five parameter sets of the hyperon couplings in the potential well depth model. |
4 The Results and Discussions
4.1 Mass-Radius Relationship of Limitation Model and Potential Well Depth Model.
Fig. 5 (Color online) Mass-radius relation with limitation model and potential well depth model. |
4.2 Mass-Gravitational Redshift Relation
Fig. 6 (Color online) Mass-gravitational redshift relationship with limitation model and potential well depth model. |
Table 5 Radius (R) and gravitational redshift (Z) of RSR J0348+0432 (1.97 M⊙-2.05 M⊙) under limitation model (L Model) and potential well depth model (P Model) respectively. |
![]() |
4.3 Discussions
Fig. 7 (Color online) The EOS of limitation model and potential well depth model. |
Fig. 8 (Color online) The particle number distribution of limitation model and potential well depth model. The upper part represents nucleonic density and the lower part represents the sum of hyperon density. |
Fig. 9 (Color online) (a) the particle number distribution of a typical parameter set in limitation model. (b) the particle number distribution of potential well depth model. The central density of a neutron star with $2.05 M_{\odot}$ are given in corresponding models. |