Novel implications on neutron stars come from extended gravity. Specifically, the GW190814 event indicated the probability of having large mass stars in the mass gap region . If the secondary component of GW190814 is a neutron star, such large masses are marginally supported by General Relativity (GR), since a very stiff Equation of State (EoS) would be needed to describe such large mass neutron stars, which would be incompatible with the GW170817 event, without any modification of gravity. In view of the two groundbreaking gravitational wave observations, we critically discuss the elevated role of extensions of GR towards the successful description of the GW190814 event, and we also speculate in a quantitative way on the important issue of the largest allowed neutron star mass.

对中子星的新影响来自扩展引力。具体来说，GW190814 事件表明在质量间隙区域有大质量恒星的可能性。如果 GW190814 的次要成分是一颗中子星，那么广义相对论 (GR) 会勉强支持这么大的质量，因为描述这么大质量的中子星需要非常严格的状态方程 (EoS)，而这与GW170817 事件，没有任何重力修改。鉴于两次开创性的引力波观测，我们批判性地讨论了 GR 扩展对成功描述 GW190814 事件的重要作用，并且我们还对最大允许中子星质量这一重要问题进行了定量推测。