arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2104.01540hep-phastro-ph.COastro-ph.GAastro-ph.HEhep-th
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暗物质的可能性质

Possible nature of Dark Matter

Wasif Husain, Anthony W. Thomas

摘要:

{We提出了一个研究的中子星模型,包含暗物质(DM)的核心。DM被假定为具有粒子性质并且是自相互作用的。利用对中子星质量和半径的约束,我们研究了玻色子和费米子DM粒子的允许性质。我们考虑的情况下,它构成高达15%的恒星的质量,即使传统的机制不能产生这么大的分数。为此,我们考虑了三种不同的中子星模型,第一种只涉及核子,第二种包括超子,最后一种涉及核心中的奇异物质。不同的EOS构建的费米子和玻色子DM的各种情况下。这些EOS解决选定的属性的DM粒子和测试结果对质量,半径和潮汐变形的限制中子星。给出了中子星内部DM和普通物质的能量密度分布。研究发现,如果DM是费米子性质的,它不仅位于核心,而且存在于恒星的任何地方,从中心到表面外,甚至可能包围它。

英文摘要:

{We present a study of neutron star models that contain dark matter (DM) in the core. The DM is assumed to have a particle nature and to be self-interacting. Using constraints on the mass and radius of neutron stars, we investigate the allowed properties of either bosonic or fermionic DM particles. We consider cases where it constitutes up to 15\% of the mass of the star, even though conventional mechanisms cannot generate such large fractions. For this purpose three different models of neutron stars are considered, the first involving nucleons only, the second including hyperons, and the last involving strange matter in the core. Different EoSs are constructed for the various cases of fermionic and bosonic DM. These EoSs are solved for selected properties of the DM particles and the results are tested against mass, radius and tidal deformability constraints for neutron stars. The distribution of energy density of DM and ordinary matter inside the neutron stars is also presented. It is found that if the DM is fermionic in nature it does not just sit in the core but it is present everywhere in the star, from the centre to outside the surface and may even envelop it.

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