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arXiv 2108.04565astro-ph.HE
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理解中子星内部物质性质的半普适关系

Semi Universal relation to understand matter properties at neutron star interiors

Ritam Mallick, Debojoti Kuzur, Rana Nandi

摘要:

关于中子星中心是否存在夸克物质,目前仍有争论。这项研究定义了一些半经验参数,量化的发生和数量的夸克物质在恒星内部。这些参数显示了所有业务系统之间的半普遍关系。其中一个参数取决于开普勒质量-半径曲线相对于静态质量-半径曲线的偏移,并表明它在所有地球轨道上都是一个常数。Z参数显示了潮汐变形性如何依赖于恒星的夸克含量和EoS的刚度。恒星的夸克含量也影响着恒星的致密性,它的依赖性几乎是普适的。经验参数给出了恒星夸克含量的界限,并表明如果夸克含量增加,恒星很可能坍缩成黑洞。可以看出,PT后质量和半径的变化与母体NS的质量成线性比例。给定强子EoS、袋常数和夸克耦合常数,我们可以得到中子星的临界质量和混合星的最大质量,而没有任何重子质量损失的相变。

英文摘要:

The occurrence of quark matter at the center of neutron stars is still in debate. This study defines some semi-empirical parameters that quantify the occurrence and the amount of quark matter at star interiors. These parameters show semi-universal relations across all the EoS. One parameter depends on the shifting of the keplerian mass-radius curve from the static one and shows it is a constant across all EoS. The Z-parameter shows how tidal deformability depends on the quark content of the star and the stiffness of the EoS. The quark content of the star also affects the compactness of the star, and its dependence is almost universal. The empirical parameter gives a bound on the quark content of the star and shows that if the amount of the quark content increases, the stars are likely to collapse into a black hole. It is seen that the change in the mass and radius after PT is linearly proportional to the mass of the parent NS. Given a hadronic EoS, bag constant, and quark coupling constant, one can have a critical mass of the neutron star and the maximum mass of the hybrid star for phase transition without any baryonic mass loss.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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