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Proto-neutron stars with heavy baryons and universal relations

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arxiv 2008.00213 v1 pith:OIJJPRM3 submitted 2020-08-01 nucl-th astro-ph.HEastro-ph.SR

classification nucl-thastro-ph.HEastro-ph.SR
keywords starscompactrelationsvaluesbaryondeltafixedmoment
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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 $\Delta(1232)$ resonance states. Global properties of hot $\Delta$-admixed hypernuclear stars are computed for fixed values of entropy per baryon ($S/A$) and lepton fraction ($Y_L$). 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 $Y_L$ 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 $Y_L$.

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  1. Investigating Universal Relations in Compact Stars featuring $\Delta-$Admixed Exotic Dense Matter

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

    Delta-admixed hypernuclear stars follow the I-Love-Q universal relations and a tight f-mode tidal relation, while the p-mode relation is much more composition-sensitive.

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