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Tidal Deformability of Dark Matter Admixed Neutron Stars

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arxiv 2207.02433 v1 pith:26B75WXZ submitted 2022-07-06 astro-ph.HE

classification astro-ph.HE
keywords mattertidaldarkdimensionlessneutronstarsdeformabilitystar
verification ladder T0 review T1 audit T2 compute T3 formal
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The tidal properties of a neutron star are measurable in the gravitational waves emitted from inspiraling binary neutron stars, and they have been used to constrain the neutron star equation of state. In the same spirit, we study the dimensionless tidal deformability of dark matter admixed neutron stars. The tidal Love number is computed in a two-fluid framework. The dimensionless tidal Love number and dimensionless tidal deformability are computed for dark matter admixed stars with the dark matter modelled as ideal Fermi gas or self-interactive bosons. The dimensionless tidal deformability shows a sharp change from being similar to that of a pure normal matter star to that of a pure dark matter star, within a narrow range of intermediate dark matter mass fraction. Based on this result, we illustrate an approach to study the dark matter parameters through the tidal properties of massive compact stars, making use of the self-similarity of the dimensionless tidal deformability-mass relations when the dark matter mass fraction is high.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. A Neutron Star Hidden Inside a Black Hole

    gr-qc 2026-08 reject novelty 5.0 of 10

    A two-fluid Tolman-Oppenheimer-Volkoff calculation with Einasto dark matter halos produces static solutions where g_rr^{-1} turns negative in a shell outside the neutron star, which the authors call a neutron star ins...

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