Proto-neutron stars with heavy baryons and universal relations
Ad. R. Raduta, Micaela Oertel, Armen Sedrakian
Abstract
ABSTRACT We use covariant density functional theory to obtain the equation of state (EoS) of matter in compact stars at non-zero temperature, including the full baryon octet as well as the Δ(1232) resonance states. Global properties of hot Δ-admixed hypernuclear stars are computed for fixed values of entropy per baryon (S/A) and lepton fraction (YL). Universal relations between the moment of inertia, quadrupole moment, tidal deformability, and compactness of compact stars are established for fixed values of S/A and YL that are analogous to those known for cold catalyzed compact stars. We also verify that the I–Love–Q relations hold at finite temperature for constant values of S/A and YL.
Topics & Concepts
PhysicsStarsBaryonNeutron starMoment of inertiaOctetEquation of stateQuadrupoleCovariant transformationAstrophysicsParticle physicsMathematical physicsQuantum mechanicsPulsars and Gravitational Waves ResearchGamma-ray bursts and supernovaeHigh-pressure geophysics and materials