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Impacts of dark matter on the f-mode oscillation of hyperon star

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arxiv 2109.01851 v2 pith:JA2TQWEM submitted 2021-09-04 nucl-th astro-ph.HEgr-qc

Impacts of dark matter on the f-mode oscillation of hyperon star

classification nucl-th astro-ph.HEgr-qc
keywords darkmatterlambdamodestarfrequencieshyperonsequation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We investigate the $f$-mode oscillation of the dark matter admixed hyperon star within the relativistic Cowling approximation. The macroscopic properties are calculated with the relativistic mean-field equation of states by assuming that the dark matter particles are inside the star. The $f$-mode oscillation frequencies (only for $l=2$) are calculated with four different neutron star equation of states. We also check the effects of hyperons/dark matter and hyperons with dark matter equation of states on the $f$-mode oscillations varying with different astrophysical quantities such as mass ($M$), radius ($R$), compactness ($M/R$), surface red-shift ($Z_s$), average density ($\bar{\rho}$), dimensionless tidal deformability ($\Lambda$) of the neutron star. Significant changes have been seen in the $f$-mode frequencies with and without hyperons/dark matter or hyperons+dark matter. Substantial correlations are observed between canonical frequencies and $\Lambda$ ($f_{1.4}-\Lambda_{1.4}$) and maximum frequencies and canonical $\Lambda$ ( $f_{max}-\Lambda_{1.4}$).

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Cited by 2 Pith papers

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  1. Bayesian analysis of density profile of light dark matter elucidating the properties of dark matter admixed neutron stars in the presence of hyperons

    nucl-th 2026-05 unverdicted novelty 5.0

    Bayesian analysis finds that the likely ranges of light dark-matter fermion mass and exponential density-profile parameter in hyperon-containing neutron stars are nearly independent of the hadronic model for symmetry-...

  2. Effects of dark matter and magnetic field on neutron star properties in relativistic mean-field theory: A single-fluid approach

    astro-ph.HE 2026-07 conditional novelty 4.0

    Fermionic dark matter and strong central magnetic fields both reduce neutron-star maximum mass and radius and lower tidal deformability in single-fluid RMF models, remaining compatible with GW/NICER constraints over t...