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General relativistic treatment of $f$-mode oscillations of hyperonic stars

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arxiv 2203.03141 v2 pith:DAPIS37B submitted 2022-03-07 astro-ph.HE gr-qcnucl-th

Bikram Keshari Pradhan (1) , Debarati Chatterjee (1) , Michael Lanoye (2) , Prashanth Jaikumar (2) ((1) Inter-University Center for Astronomy , Astrophysics , pune , 411007 , India
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(2) California State University Long Beach Long Beach California 90840 U.S.A.)
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keywords modestarshyperonicfrequencygeneralneutronoscillationsrelativistic
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abstract

We present a systematic study of $f$-mode oscillations in neutron stars containing hyperons, extending recent results obtained within the Cowling approximation to linearized General Relativity. Employing a relativistic mean field model, we find that the Cowling approximation can overestimate the quadrupolar $f$-mode frequency of neutron stars by up to 30\% compared to the frequency obtained in the linearized general relativistic formalism. Imposing current astrophysical constraints, we derive updated empirical relations for gravitational wave asteroseismology. The frequency and damping time of quadrupole $f$-mode oscillations of hyperonic stars are found to be in the range of 1.47 - 2.45kHz and 0.13 - 0.51 sec respectively. Our correlation studies demonstrate that among the various parameters of the nucleonic and hyperonic sectors of the model, the nucleon effective mass shows the strongest correlation with mode characteristics and neutron star observables. Estimates for the detectability of $f$-modes in a transient burst of gravitational waves from isolated hyperonic stars is also provided.

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Cited by 3 Pith papers

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

  1. Oscillations of Dissipative Neutron Stars: The Impact of Hyperonic Reaction Rates

    gr-qc 2026-08 conditional novelty 6.0 of 10

    Finite hyperonic reaction rates, encoded as a complex sound speed, damp neutron-star f-modes and remove hyperonic g-modes before their restoring force vanishes, producing a tidal lag.

  2. Role of density profile of sub-GeV dark matter in the properties of dark matter admixed quark stars with Bayesian analysis of dark-NJL model

    hep-ph 2025-09 reject novelty 5.0 of 10

    A model of quark stars with a variable dark matter density profile claims sub-GeV dark matter can satisfy all current compact star constraints.

  3. Effect of Dark matter and $\sigma$-cut potential on radial and non-radial oscillation modes in neutron stars

    astro-ph.HE 2025-07 conditional novelty 4.0 of 10

    Dark matter-admixed neutron stars oscillate at higher f- and p1-mode frequencies than ordinary or σ-cut models, while quasi-universal oscillation relations still hold.

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