Frequencies of $f$- and $p$-oscillation modes in cold and hot compact stars

Abstract

A large collection of equations of state (EOSs) built within the covariant density functional (CDF) theory of hadronic matter and allowing for density dependent (DD) couplings is employed to study polar $f$- and $p$- oscillations of cold and hot compact stars. Correlations between oscillation frequencies of cold purely nucleonic neutron stars (NSs), their global parameters as well as properties of nuclear matter (NM) are investigated by considering a set of models from Beznogov and Raduta, [Phys.~Rev.~C 107, 045803 (2023)], where a number of constraints on the saturation properties of NM, pure neutron matter (PNM) and the lower bound of the maximal NS mass were imposed within a Bayesian framework. The roles of finite temperature and exotic particle degrees of freedom, e.g., hyperons, $\Delta$-resonances, anti-kaon condensates or a hadron to quark phase transition, are addressed by employing a family of models publicly available on \textsc{CompOSE} and assuming idealized profiles of temperature or entropy per baryon and charge fraction. We find that finite temperature effects reduce the oscillation frequencies of nucleonic stars while the opposite effect is obtained for stars with exotic particle degrees of freedom. When the $\Gamma$-law is employed to build finite temperature EOSs, errors in estimating oscillation modes frequencies are of the order of 10\% to 30\%, depending on the mass. Throughout this work the Cowling approximation is used.

12 pages, 7 figures, 2 tables

References in corpus (24)

• A Massive Pulsar in a Compact Relativistic Binary
• PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
• A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
• Refined Mass and Geometric Measurements of the High-Mass PSR J0740+6620
• New Hyperon Equations of State for Supernovae and Neutron Stars in Density-dependent Hadron Field Theory
• Testing Approximations of Thermal Effects in Neutron Star Merger Simulations
• Signatures of hadron-quark mixed phase in gravitational waves
• A new temperature dependent hyperonic equation of state: application to rotating neutron star models and I-Q-relations
• Proto-neutron stars with heavy baryons and universal relations
• Relativistic description of dense matter equation of state and compatibility with neutron star observables: a Bayesian approach
• Gravitational wave asteroseismology with protoneutron stars
• Merger and post-merger of binary neutron stars with a quark-hadron crossover equation of state
• General relativistic treatment of $f$-mode oscillations of hyperonic stars
• Effect of hyperons on f-mode oscillations in Neutron Stars
• Impact of the equation of state on $f$- and $p$- mode oscillations of neutron stars
• Equations of state for hot neutron stars -- II. The role of exotic particle degrees of freedom
• EoS for hot neutron stars
• Phenomenological quark-hadron equations of state with first-order phase transitions for astrophysical applications
• Universal relations for rapidly rotating cold and hot hybrid star
• Determination of properties of protoneutron stars toward black hole formation via gravitational wave observations
• Bayesian Inference of the Dense Matter Equation of State built upon Covariant Density Functionals
• Hot neutron stars and their equation of state
• Constraining dense matter physics using f-mode oscillations in neutron stars
• New equation of state involving Bose-Einstein condensate of antikaon for supernova and neutron star merger simulations

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