论文标题
GW170817和GW190425作为黑暗和核事物的混合星
GW170817 and GW190425 as Hybrid Stars of Dark and Nuclear Matters
论文作者
论文摘要
我们提出了三种由核和暗物质组成的紧凑型杂种恒星的情况。这些混合恒星可以为Ligo/处女座事件GW170817和GW190425提供替代解释。为了证明我们的提议，我们通过使用SLY4，APR4和SKB状态方程（EOS）来解决杂化之星的Tolman-Oppenheimer-Volkoff配置，用于核物质，以及Colpi等人Colpi等人提出的Bosonic自我互动暗物质（SIDM）的EOS。然后，我们获得了他们的质量 - 拉迪乌斯和潮汐爱数（TLN） - 质量关系，并进一步研究了普遍的Bardeen-Thorne-Meltzer（BTM）标准，这些紧凑型物体可能的鞍座不稳定性。我们的结果表明，混合恒星场景能够解释GW170817和GW190425。某些杂种恒星可以在10公里约10公里的同时具有紧凑的中子或混合核，同时具有厚的暗物质壳，因此它们比典型的中子星的最大质量更大，但用大约相同的中子恒星检测到电磁。相反，我们还从GW190425的参数估计中推断出暗物质模型。我们提出的混合恒星可以通过即将到来的Ligo/处女座O3事件进一步测试。
We propose three scenarios for compact hybrid stars composed of nuclear and dark matter. These hybrid stars could provide alternative interpretations to the LIGO/Virgo events GW170817 and GW190425. To demonstrate our proposal, we solve the Tolman-Oppenheimer-Volkoff configurations of hybrid stars by using the SLy4, APR4, and SKb equations of state (EoS) for nuclear matter, and an EoS for a bosonic self interacting dark matter (SIDM) proposed by Colpi et al \cite{Colpi:1986ye}. We then obtain their mass-radius and tidal Love number (TLN)-mass relations, and further examine the possible saddle instability of these compact objects by the generalized Bardeen-Thorne-Meltzer (BTM) criteria. Our results show that the hybrid star scenarios are able to explain GW170817 and GW190425. Some hybrid stars can have compact neutron or mixed cores around 10 km while possessing thick dark matter shells, thus they can be more massive than the maximum mass of the typical neutron stars but are electromagnetically detected with about the same size of neutron stars. Reversely, we also infer the dark matter model from the parameter estimation of GW190425. Our proposed hybrid stars can be further tested by the coming LIGO/Virgo O3 events.
