论文标题
关于GW190814的性质及其对理解上核问题的影响
On the nature of GW190814 and its impact on the understanding of supranuclear matter
论文作者
论文摘要
通过Ligo Scientific and Pirgo合作（LVC），观察到一个紧凑型物体，其质量为2.50-267万美元_ {\ odot} $，有可能提高我们对国家核方程的理解。 LVC的重力波分析表明，GW190814可能是二进制黑洞系统，但次要成分也可能是迄今为止观察到的最重的中子星。我们使用先前衍生的核能物理 - 培养物天体物理学框架来解决该物体的性质。根据我们的发现，我们确定GW190814是二进制黑洞合并，概率为$ 99.9 \％$。即使我们削弱了先前在中子星的最大质量上使用的约束，二进制黑洞起源的可能性仍然为$ \ sim 81 \％$。此外，我们研究了这种观察对我们对状态核方程的影响，通过分析中子恒星的质量 - 拉迪乌斯图中的允许区域的二进制黑洞或中子恒星 - 黑色洞场景。我们发现，次要物体是中子星的不太可能场景需要具有最大声音速度的状态方程，并具有最大的声音$ C_S \ geq \ sqrt {0.6} $乘以光速，而二进制黑洞方案则不提供任何新的见解。
The observation of a compact object with a mass of $2.50-2.67M_{\odot}$ on August 14, 2019, 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 $\sim 81\%$. 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 $c_s\geq \sqrt{0.6}$ times the speed of light, while the binary black hole scenario does not offer any new insight.
