论文标题
超级质量中子星排除双星星
Supermassive Neutron Stars Rule Out Twin Stars
论文作者
论文摘要
我们研究了一个假设的$ 2.5 \，\ mathrm {m_ \ odot} $中子星的含义，就强烈的相过渡到夸克物质的可能性。我们使用由可参数化的相对论平均值模型过渡提供的变化刚度的状态（EO）方程，以恒定的声音速度向夸克物质过渡。我们发现能量密度的不连续性与EOS产生的最大质量之间存在很强的联系。我们证明，对于能量密度的较大不连续性，无法实现高最大质量，这对于可见的双星是必不可少的，尤其是对于软EOSS所必需的。结果，双星和最大质量为$ m_ {max} \ gtrsim2.2 \，m_ \ odot $是互斥的。
We investigate the implications of a hypothetical $2.5\,\mathrm{M_\odot}$ neutron star in regard to the possibility of a strong phase transition to quark matter. We use equations of state (EoS) of varying stiffness provided by a parameterizable relativistic mean filed model transitioning in a first order phase transition to quark matter with a constant speed of sound. We find a strong connection between the discontinuity in energy density and the maximal mass generated by the EoS. We demonstrate, that high maximal masses cannot be realized for large discontinuities in energy density, which are necessary for visible twin stars, especially for soft EoSs. As a result twin stars and maximal masses of $M_{max}\gtrsim2.2\,M_\odot$ are mutually exclusive.
