论文标题

暗物质对混合恒星特性的影响

Dark matter effects on hybrid star properties

论文作者

Lenzi, César H., Dutra, Mariana, Lourenço, Odilon, Lopes, Luiz L., Menezes, Débora P.

论文摘要

在目前的工作中,我们研究了暗物质(DM)对杂交恒星性质的影响。我们假设暗物质与Hadronic和Quark物质混合在一起,并通过交换Higgs Boson与它们互动。杂种恒星性质是从用麦克斯韦处方计算的状态方程获得的。对于HADRONIC物质,我们使用NL3*参数集,对于Quark Matter,MIT袋模型具有矢量相互作用。我们看到暗物质不会影响相变点(压力和化学电位),而会改变能量密度的不连续性,这最终减少了包含夸克芯的最小质量恒星。此外,它发生了很大的变化,恒星家族质量 - 拉迪乌斯图并移动置信线内的合并极化曲线。另一个有趣的特征是DM在构建的混合恒星的夸克芯中的影响。我们的结果表明,对于较高的深色颗粒费米动量值,核心半径增加。

In the present work we investigate the effects of dark matter (DM) on hybrid star properties. We assume that dark matter is mixed with both hadronic and quark matter and interact with them through the exchange of a Higgs boson. The hybrid star properties are obtained from equations of state calculated with a Maxwell prescription. For the hadronic matter we use the NL3* parameter set and for the quark matter, the MIT bag model with a vector interaction. We see that dark matter does not influence the phase transition points (pressure and chemical potential) but shifts the discontinuity on the energy density, which ultimately reduces the minimum mass star that contains a quark core. Moreover, it changes considerably the star family mass-radius diagrams and moves the merger polarizability curves inside the confidence lines. Another interesting feature is the influence of DM in the quark core of the hybrid stars constructed. Our results show an increase of the core radius for higher values of the dark particle Fermi momentum.

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