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arXiv · 2602.12495

Dark matter effects on the properties of hybrid neutron stars

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

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.

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Jin-Biao Wei, G. Wu, H. Chen, G. F. Burgio, H. -J. Schulze. 2026-02-13. Dark matter effects on the properties of hybrid neutron stars. https://arxiv.org/abs/2602.12495

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