Stellar Core Collapse with Hadron-Quark Phase Transition

Abstract

Hadronic matter undergoes a deconfinement transition to quark matter at high temperature and/or high density. It would be realized in collapsing cores of massive stars. In the framework of MIT bag model, the ambiguities of the interaction are encapsulated in the bag constant. Some progenitor stars that invoke the core collapses explode as supernovae, and other ones become black holes. The fates of core collapses are investigated for various cases. Equations of state including the hadron-quark phase transition are constructed for the cases of the bag constant B=90, 150 and 250 MeV fm^{-3}. To describe the mixed phase, the Gibbs condition is used. Adopting the equations of state with different bag constants, the core collapse simulations are performed for the progenitor models with 15 and 40Msolar. If the bag constant is small as B=90 MeV fm^{-3}, an interval between the bounce and black hole formation is shortened drastically for the model with 40Msolar and the second bounce revives the shock wave leading to explosion for the model with 15Msolar.

5 pages, 5 figures, references corrected, accepted for publication in A&A

References in corpus (5)

• Shapiro delay measurement of a two solar mass neutron star
• Signals of the QCD phase transition in core-collapse supernovae
• Core-collapse supernova explosions triggered by a quark-hadron phase transition during the early post-bounce phase
• Astrophysical Implications of Equation of State for Hadron-Quark Mixed Phase: Compact Stars and Stellar Collapses
• Strange matter in core-collapse supernovae

Cited by in corpus (15)

• Equations of state for supernovae and compact stars
• Neutron Stars and the Nuclear Equation of State
• Constraining the onset density of the hadron-quark phase transition with gravitational-wave observations
• Nuclear Equation of state for Compact Stars and Supernovae
• Hyperons in neutron stars and supernova cores
• Core-collapse supernova simulations and the formation of neutron stars, hybrid stars, and black holes
• Gravitational-wave Signature of a First-order Quantum Chromodynamics Phase Transition in Core-Collapse Supernovae
• Dense and Hot QCD at Strong Coupling
• Hot third family of compact stars and the possibility of core-collapse supernova explosions
• Influence of density dependence of symmetry energy in hot and dense matter for supernova simulations
• Progenitor Dependence of Hadron-quark Phase Transition in Failing Core-collapse Supernovae
• Towards generating a new supernova equation of state: A systematic analysis of cold hybrid stars
• Numerical Simulation of the Hydrodynamical Combustion to Strange Quark Matter in the Trapped Neutrino Regime
• Phase-transition-induced collapse of proto-compact stars and its implication for supernova explosions
• How Well Do We Know The Supernova Equation of State?