Stability of Neutron-Dark Matter Mixed Stars and Hybrid Stars
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866911296379682816 |
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| author | Zhou, Xiao-Ding Chen, Tian-Shun Wu, Si-Man Zhang, Kilar |
| author_facet | Zhou, Xiao-Ding Chen, Tian-Shun Wu, Si-Man Zhang, Kilar |
| contents | Concerning the stability of two-fluid star models, we prove the rigorous equivalence of two independent determining methods for mixed stars, after a brief review of the hybrid star case. Our derivations apply to general multi-fluid cases, and here we take dark matter admixed neutron star models for example, demonstrating a stability boundary distinct from the single-fluid case. Stable configurations form a surface in the three-dimensional parameter space of (either) central pressure, mass, and radius, which yields a group containing stable mixed stars. This group includes twin stars with identical masses and radii but different interior structures. These results can help interpret compact star observations and constrain dark matter properties through astrophysics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_01641 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Stability of Neutron-Dark Matter Mixed Stars and Hybrid Stars Zhou, Xiao-Ding Chen, Tian-Shun Wu, Si-Man Zhang, Kilar High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory Mathematical Physics Concerning the stability of two-fluid star models, we prove the rigorous equivalence of two independent determining methods for mixed stars, after a brief review of the hybrid star case. Our derivations apply to general multi-fluid cases, and here we take dark matter admixed neutron star models for example, demonstrating a stability boundary distinct from the single-fluid case. Stable configurations form a surface in the three-dimensional parameter space of (either) central pressure, mass, and radius, which yields a group containing stable mixed stars. This group includes twin stars with identical masses and radii but different interior structures. These results can help interpret compact star observations and constrain dark matter properties through astrophysics. |
| title | Stability of Neutron-Dark Matter Mixed Stars and Hybrid Stars |
| topic | High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory Mathematical Physics |
| url | https://arxiv.org/abs/2512.01641 |