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arXiv 2602.12495nucl-thastro-ph.HE
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暗物质对混合中子星性质的影响

Dark matter effects on the properties of hybrid neutron stars

School of Mathematics and Physics, China University of Geosciences(中国地质大学数学与物理学院);INFN, Sezione di Catania, Dipartimento di Fisica, Universitá di Catania(意大利国家核物理研究所卡塔尼亚分部卡塔尼亚大学物理系)

Jin-Biao Wei, G. Wu, H. Chen, G. F. Burgio, H. -J. Schulze

AI总结:

暗物质影响混合中子星的相变临界质量、可能引发夸克物质形成并降低振荡频率。

摘要:

我们研究了暗物质对混合中子星性质的影响,特别是其对质量-半径关系、最大质量值以及介子-夸克相变的影响。为了确定暗物质混合混合中子星(DHSs)的平衡配置,我们还研究了它们的径向振荡。对于双流体系统, stellar 结构方程和径向振荡方程均被求解,其中普通物质组分和暗物质组分仅通过引力耦合。对于普通物质组分,我们采用布鲁克纳-海特-福克方法处理核物质,采用狄拉克-施温格或场相关子模型处理夸克物质。对于暗物质组分,我们使用一种非自湮灭的自相互作用费米模型。我们发现,在DHSs中暗物质的存在导致介子-夸克相变临界质量的降低,可能引发暗物质吸积星中夸克物质的出现,并显著降低径向振荡频率。

英文摘要:

We study the effects of dark matter on the properties of hybrid neutron stars, in particular the influence on the mass-radius relation, the value of the maximum mass, and the hadron-quark phase transition. To single out the equilibrium configurations of dark-matter-admixed hybrid neutron stars (DHSs), we also study their radial oscillations. Both the stellar structure equations and the radial oscillation equations are solved for the two-fluid system, where the ordinary matter component and dark matter component couple only through gravity. For the ordinary matter components, we adopt the Brueckner-Hartree-Fock method for nuclear matter, and the Dyson-Schwinger or the field-correlator model for quark matter. For the dark matter component, we use a non-self-annihilating self-interacting fermionic model. We find that the presence of dark matter in DHSs leads to a decrease of the critical mass of the hadron-quark phase transition, a related possible onset of quark matter in dark-matter accreting stars, and a significant reduction of radial oscillation frequencies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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