论文标题
称重带有筛查重力的巨大中子星：PSR J0740+6620和GW190814二级成分
Weighing massive neutron star with screening gravity: A look on PSR J0740+6620 and GW190814 secondary component
论文作者
论文摘要
中子星（NSS）是在极端条件下对强场策略和核物质的重力来限制重力的出色自然实验室。 Motivated by the recent discovery of a compact object with $2.59^{+0.08}_{-0.09} M_\odot$ in the binary merger GW190814, if this object was a NS, it serves as a strong constraint on the NS equation of state (EoS), ruling out several soft EoSs favored by GW170817 event.在这项工作中，我们重新审视了NS筛选（薄壳效应）对NS Mass-Radius关系的最大质量的问题，其中NS内部的微观物理是由现实的软EOSS给出的。我们发现，从改良的重力，旋转效应和逼真的软eoss的适当组合中，可以实现高质量并解释GW190814二级成分，并且作为回报，诸如PSR J0740+6620（迄今为止最多的NS大量确认）也可以回报。结果表明，重力可以在估计NS的最大质量中发挥重要作用，即使使用软EOSS，也可以产生非常高的质量。因此，在对重力和EOS之间静静力平衡的竞争中，原则上，某些软EOSS不能完全考虑到重力效应而被完全排除。
Neutron stars (NSs) are excellent natural laboratories to constrain gravity on strong field regime and nuclear matter in extreme conditions. Motivated by the recent discovery of a compact object with $2.59^{+0.08}_{-0.09} M_\odot$ in the binary merger GW190814, if this object was a NS, it serves as a strong constraint on the NS equation of state (EoS), ruling out several soft EoSs favored by GW170817 event. In this work, we revisit the question of the maximum mass of NSs considering a chameleon screening (thin-shell effect) on the NS mass-radius relation, where the microscopic physics inside the NS is given by realistic soft EoSs. We find that from appropriate and reasonable combination of modified gravity, rotation effects and realistic soft EoSs, that it is possible to achieve high masses and explain GW190814 secondary component, and in return also NSs like PSR J0740+6620 (the most NS massive confirmed to date). It is shown that gravity can play an important role in estimating maximum mass of NSs, and even with soft EoSs, it is possible to generate very high masses. Therefore, in this competition on the hydrostatic equilibrium between gravity and EoS, some soft EoSs, in principle, cannot be completely be ruled out without first taking into account gravitational effects.
