论文标题
GW190814：上下夸克之星的间接证据
GW190814: Circumstantial Evidence for Up-Down Quark Star
论文作者
论文摘要
Within a confining quark matter model which considers phenomenologically the quark confinement and asymptotic freedom as well as the chiral symmetry restoration and quark deconfinement at high baryon density, we find that if the up-down quark matter ($ud$QM) is more stable than nuclear matter and strange quark matter (SQM), the maximum mass of static quark stars with $ud$QM is $ 287万美元_ {\ odot} $达成一致，与重力波信号GW170817的Star Tidal可变形性的约束以及PSR J0030+0451的质量 - 拉迪乌斯和PSR J0740+6620的Mass-Radius均通过NICER测量。相比之下，传统的奇怪夸克之星带有SQM比核物质更稳定，而核物质比$ ud $ QM更稳定，最大静态质量仅为187万美元_ {\ odot} $，其半径与Nicer的约束显着偏离。因此，我们的结果提供了间接证据，表明最近报道的GW190814的次要组件，质量为$ 2.59^{+0.08} _ { - 0.09} m_ \ odot $可能是上下夸克之星。
Within a confining quark matter model which considers phenomenologically the quark confinement and asymptotic freedom as well as the chiral symmetry restoration and quark deconfinement at high baryon density, we find that if the up-down quark matter ($ud$QM) is more stable than nuclear matter and strange quark matter (SQM), the maximum mass of static quark stars with $ud$QM is $2.87M_{\odot}$ under agreement with both the constraints on star tidal deformability from gravitational wave signal GW170817 and the mass-radius of PSR J0030+0451 and PSR J0740+6620 measured by NICER. In contrast, the conventional strange quark star with the SQM that is more stable than nuclear matter while the nuclear matter is more stable than $ud$QM, has a maximum static mass of only $1.87M_{\odot}$ and its radius significantly deviates from NICER's constraint. Our results thus provide circumstantial evidence suggesting the recently reported GW190814's secondary component with a mass of $2.59^{+0.08}_{-0.09}M_\odot$ could be an up-down quark star.
