论文标题
重力波信号GW190814作为各向异性中子星的次要组成部分
Secondary component of gravitational-wave signal GW190814 as an anisotropic neutron star
论文作者
论文摘要
重力波信号GW190814涉及一个紧凑的对象，其质量$（2.50-2.67）{\ rm m} _ \ odot $在所谓的低质量间隙中。到目前为止，尚未达到关于其性质的一般共识，是黑洞，中子之星或异国情调的恒星。我们研究了这个紧凑的物体是各向异性中子星的可能性。中子恒星核心中的各向异性自然是由超流体，超子，强磁场等效果自然出现的，并使最大质量超过理想的各向同性恒星的质量。我们认为Krori-Barua Ansatz对各向异性核心进行建模，并使用Ligo/Pirgo观测值GW170817和GW190814来约束状态方程。我们发现，如果半径在$（13.2-14.0）\，{\ rm km km km km km} $的范围内，与Ligo/piro的约束相兼容，则GW190814二级成分可以是与Ligo/piro限制的各向异性中子星星。 g}/{\ rm cm}^3 $。
The gravitational-wave signal GW190814 involves a compact object with mass $(2.50-2.67){\rm M}_\odot$ within the so-called low mass gap. As yet, a general consensus on its nature, being a black hole, a neutron star or an exotic star, has not been achieved. We investigate the possibility this compact object to be an anisotropic neutron star. Anisotropies in a neutron star core arise naturally by effects such as superfluidity, hyperons, strong magnetic fields and allow the maximum mass to exceed that of the ideally isotropic stars. We consider the Krori-Barua ansatz to model an anisotropic core and constrain the equation of state with LIGO/Virgo observations GW170817 and GW190814. We find that the GW190814 secondary component can be an anisotropic neutron star compatible with LIGO/Virgo constraints if the radius attains a value in the range $(13.2-14.0)\,{\rm km}$ with the anisotropic core's boundary density in the range $(3.5-4.0)\cdot 10^{14}{\rm g}/{\rm cm}^3$.
