A Comparative study of hyperon equations of state in supernova simulations

Abstract

A comparative study of the $\Lambda$ hyperon equations of state of Banik, Hempel and Banyopadhyay (BHB) \citep{bhb} and \citet{shen11} (denoted as HShen $\Lambda$) for core collapse supernova (CCSN) simulations is carried out in this work. The dynamical evolution of a protoneutron star (PNS) into a black hole is investigated in core collapse supernova simulations in the general relativistic one dimensional code using the BHB$\Lambda \varphi$ and HShen $\Lambda$ equation of state (EoS) tables and different progenitor models from Woosley and Heger \citep{Woos}. Radial profiles of the mass fractions of baryons, the density as well as the temperature in the PNS at different moments in time, are compared for both EoS tables. The behaviour of the central density of the PNS with time is demonstrated for those two $\Lambda$ hyperon EoS tables and compared with their corresponding nuclear EoS tables. It is observed that the black hole formation time is higher in the BHB$\Lambda \varphi$ case than in the HShen $\Lambda$ EoS for the entire set of progenitor models adopted here, because the repulsive $\Lambda$-$\Lambda$ interaction makes the BHB$\Lambda \varphi$ EoS stiffer. Neutrino emission with the $\Lambda$ hyperon EoS ceases earlier than that of its nuclear counterpart. The long duration evolution of the shock radius and gravitational mass of the PNS after a successful supernova explosion with enhanced neutrino heating are studied with the BHB$\Lambda \varphi$ EoS and $s$20WH07 progenitor model. The PNS is found to remain stable for 4 s and might evolve into a cold neutron star.

LaTeX; 25 pages including two tables and 10 figures; to be published in the Astrophysical Journal

References in corpus (12)

• A Massive Pulsar in a Compact Relativistic Binary
• Nucleosynthesis and Remnants in Massive Stars of Solar Metallicity
• Hyperon Puzzle: Hints from Quantum Monte Carlo Calculations
• Signals of the QCD phase transition in core-collapse supernovae
• New Hyperon Equations of State for Supernovae and Neutron Stars in Density-dependent Hadron Field Theory
• Tables of Hyperonic Matter Equation of State for Core-Collapse Supernovae
• Astrophysical Implications of Equation of State for Hadron-Quark Mixed Phase: Compact Stars and Stellar Collapses
• Constraining hypernuclear density functional with $\Lambda$-hypernuclei and compact stars
• EMMI Rapid Reaction Task Force Meeting on 'Quark Matter in Compact Star'
• Physics input for modelling superfluid neutron stars with hyperon cores
• Massive Neutron Stars with Antikaon Condensates in a Density Dependent Hadron Field Theory
• Probing the metastability of protoneutron star with hyperon in core-collapse supernova

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• Equation of State Dependent Dynamics and Multimessenger Signals from Stellar-mass Black Hole Formation
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• Hyperons in neutron stars and supernova cores
• Equation of State and Progenitor Dependence of Stellar-Mass Black-Hole Formation
• Constraining the relativistic mean-field model equations of state with gravitational wave observations
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• Model-independent Astrophysical Constraints on Leptophilic Dark Matter in the Framework of Tsallis Statistics
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• Neutron Stars: Laboratories for fundamental physics under extreme astrophysical conditions
• Nuclear matter calculations with the phenomenological three-nucleon interaction
• Constraints on light Dark Matter fermions from relic density consideration and Tsallis statistics
• Strangeness in astrophysics: Theoretical developments