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g-mode Oscillations in Neutron Stars with Hyperons

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arxiv 2212.09875 v1 pith:DAMHBYQ5 submitted 2022-12-19 nucl-th astro-ph.HE

g-mode Oscillations in Neutron Stars with Hyperons

Vinh Tran , Suprovo Ghosh , Nicholas Lozano , Debarati Chatterjee , Prashanth Jaikumar This is my paper
classification nucl-th astro-ph.HE
keywords neutronstarscoreg-modehyperonsmatterstarbaryons
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A common alternative to the standard assumption of nucleonic composition of matter in the interior of a neutron star is to include strange baryons, particularly hyperons. Any change in composition of the neutron star core has an effect on g-mode oscillations of neutron stars, through the compositional dependence of the equilibrium and adiabatic sound speeds. We study the core g-modes of a neutron star contaning hyperons, using a variety of relativistic mean field models of dense matter that satisfy observational constraints on global properties of neutron stars. Our selected models predict a sharp rise in the g-mode frequencies upon the onset of strange baryons. Should g-modes be observed in the near future, their frequency could be used to test the presence of hyperonic matter in the core of neutron stars.

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Cited by 2 Pith papers

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  1. Reaction-constrained composition \(g\)-modes in neutron stars with antikaon condensates, hyperons, and \(\Delta(1232)\) resonances

    astro-ph.HE 2026-07 conditional novelty 7.0

    Antikaon condensates create a distinct composition g-mode that survives fast kaon equilibration, while strong Delta equilibration suppresses the Delta-driven mode except where a frozen Lambda gradient survives.

  2. Trace anomaly and interior curvature of neutron stars in energy-momentum squared gravity

    nucl-th 2026-06 unverdicted novelty 4.0

    In EMSG, neutron star trace anomaly profiles increase monotonically from core to surface and curvature invariants organize into bands versus the trace anomaly, extending the GR correspondence with coupling-dependent s...