论文标题
$σ$ - 切可能对具有或没有超音芯的中子星的性质的影响
Effect of the $σ$-cut potential on the properties of neutron stars with or without a hyperonic core
论文作者
论文摘要
由于最近观察到高质量脉冲星（$ m \ simeq 2 m _ {\ odot} $），我们在高密度物质的状态（EOS）方程中采用了$σ$ -CUT的潜力，以及使用TM1 $^{*} $ parameter使用TM1 $^{*} $ parameter使用TM1 $^{*} $ parameter的高密度（EOS）中性星的性质（EOS）。已知$σ$ - cut的潜力可减少$σ$场的贡献，从而导致高密度的EOS僵化，从而导致更大的中子星质量，而不会影响正常饱和密度下的核物质的性质。我们还分析了相同对纯中子物质的影响以及带有和没有超音速核心的中子恒星物质，并将其与可用的理论，实验和观察数据进行了比较。还计算了相应的潮汐变形性（$λ_{1.4} $）。通过选择固定在超核电位上的介子 - hyperon耦合，我们通过使用$ f_ {s} = 0.6 $的$σ$ -CUT潜力来获得$ \％$ $增加的质量。我们的结果与各种实验性约束和观察数据非常吻合，特别是与GW170817数据。
Motivated by the recent observation of high-mass pulsars ($M \simeq 2 M_{\odot}$), we employ the $σ$-cut potential on the equation of state (EOS) of high-density matter and the properties of neutron stars within the relativistic mean-field (RMF) model using TM1$^{*}$ parameter set. The $σ$-cut potential is known to reduce the contributions of the $σ$ field, resulting in a stiffer EOS at high densities and hence leading to larger neutron star masses without affecting the properties of nuclear matter at normal saturation density. We also analyzed the effect of the same on pure neutron matter and also on the neutron star matter with and without hyperonic core and compared it with the available theoretical, experimental, and observational data. The corresponding tidal deformability ($Λ_{1.4}$) is also calculated. With the choice of meson-hyperon coupling fixed to hypernuclear potentials, we obtain $\approx 10~\%$ increase in mass by employing the $σ$-cut potential for $f_{s} = 0.6$. Our results are in good agreement with various experimental constraints and observational data, particularly with the GW170817 data.
