Exploring the Structural Properties of Anisotropic Dark Matter-Admixed Quark Stars

2025/05/26 by Grigoris Panotopoulos, Ángel Rincón, Panotopoulos, G. +3
Physics and Astronomy · #Astronomy and Astrophysical Research #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Astrophysical Phenomena (astro-ph.HE) #High Energy Physics - Phenomenology (hep-ph) #Solar and Stellar Astrophysics (astro-ph.SR) #Stellar, planetary, and galactic studies

paper · pdf · doi:10.48550/arxiv.2505.20545

openalex publication_date 2025/05/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We investigate anisotropic compact stars comprising two non-interacting fluids: quark matter and condensed dark matter. Using the MIT Bag model equation of state for quark matter and Bose-Einstein Condensate equation of state for dark matter, we numerically compute interior solutions for those two-fluid component spherical configurations. Varying the initial central density ratio of dark matter to quark matter, we examine how different proportions of these components influence the mass-radius profile, the factor of compactness as well as the quark mass fraction. Recent studies suggest that quark matter may exist in the cores of massive neutron stars, significantly affecting their structure and stability. We calculate the factor of compactness for both negative and positive anisotropy cases explored in this article. Our findings demonstrate that dark matter-admixed quark stars are more compact yet less massive compared to pure quark matter stars, aligning with recent theoretical predictions and gravitational wave observations.

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Related

• Dark matter effects on the properties of quark stars and the implications for the peculiar objects
• Implications of Fermionic Dark Matter Interactions on Anisotropic Neutron Stars
• Structure of Stars and Nuclei
• The Effect of a Dark Matter Core on the Structure of a Rotating Neutron Star
• How compact stars challenge our view about dark matter