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Dynamical evolution of dark matter admixed neutron stars

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arxiv 2201.02274 v1 pith:IH5VBYRM submitted 2022-01-06 gr-qc astro-ph.HEhep-ph

Dynamical evolution of dark matter admixed neutron stars

classification gr-qc astro-ph.HEhep-ph
keywords matterdarkdynamicalneutronadmixeddynamicallyevolvefirst
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We dynamically evolve for the first time dark matter admixed neutron stars with fermionic dark matter. These systems are mixtures of the ordinary nuclear matter of a neutron star and dark matter. To perform our dynamical evolutions, we derive the equations of motion, in conservation form, for spherically symmetric systems with an arbitrary number of perfect fluids. Using finite volume and high-resolution shock-capturing methods, we dynamically evolve the two-fluid case, with the first fluid modeling ordinary matter and the second fluid modeling dark matter. We use our dynamical solutions to study nonlinear stability, radial oscillation frequencies, and a dynamical formation process.

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Cited by 3 Pith papers

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

  1. Non-radial pulsations of gravitationally coupled two-fluid neutron stars in general relativity

    gr-qc 2026-05 unverdicted novelty 7.0

    A new relativistic linear perturbation formalism is derived for polar modes in gravitationally coupled two-fluid neutron stars, with numerical computation of representative f- and p-mode spectra classified by dominant...

  2. The crust of dark-matter admixed neutron stars: bulk properties and torsional oscillations

    gr-qc 2026-06 unverdicted novelty 5.0

    Dark matter admixed neutron stars show up to 12% thinner crusts and higher torsional oscillation frequencies than pure neutron stars when dark matter forms a core, with analytical formulas matching numerics at sub-per...

  3. Bulk viscosity from neutron decays to dark baryons in neutron star matter

    astro-ph.HE 2025-09 conditional novelty 5.0

    Neutron dark decays modify the equation of state and either mildly suppress or strongly enhance bulk viscosity in neutron star merger conditions, depending on the in-medium decay rate.