The observation of a compact object with a mass of 2.50–2.67M _⊙ on 2019 August 14, by the LIGO Scientific and Virgo collaborations (LVC) has the potential to improve our understanding of the supranuclear equation of state. While the gravitational-wave analysis of the LVC suggests that GW190814 likely was a binary black hole system, the secondary component could also have been the heaviest neutron star observed to date. We use our previously derived nuclear-physics-multimessenger astrophysics framework to address the nature of this object. Based on our findings, we determine GW190814 to be a binary black hole merger with a probability of >99.9%. Even if we weaken previously employed constraints on the maximum mass of neutron stars, the probability of a binary black hole origin is still ∼81%. Furthermore, we study the impact that this observation has on our understanding of the nuclear equation of state by analyzing the allowed region in the mass–radius diagram of neutron stars for both a binary black hole or neutron star–black hole scenario. We find that the unlikely scenario in which the secondary object was a neutron star requires rather stiff equations of state with a maximum speed of sound times the speed of light, while the binary black hole scenario does not offer any new insight.

一个紧凑的对象的具有2.50-2.67的质量的观测中号 _⊙在2019年8月14日，由LIGO Scientific和处女座的合作（LVC）有可能增进我们对超核状态方程的理解。虽然对LVC的重力波分析表明GW190814可能是双星黑洞系统，但次要分量也可能是迄今为止观测到的最重的中子星。我们使用我们先前派生的核物理多信使天体物理学框架来解决这个天体的本质。根据我们的发现，我们确定GW190814为二值黑洞合并，可能性> 99.9％。即使我们削弱了先前对中子星最大质量的限制，双星黑洞起源的可能性仍然约为81％。此外，我们通过分析双星黑洞或中子星-黑洞情形的中子星质量-半径图中的允许区域，来研究这种观察对我们对核态方程的理解的影响。我们发现次要物体是中子星的不太可能发生的情况需要具有最大声速的相当刚性的状态方程 倍的光速，而二元黑洞场景则无法提供任何新的见解。