CORE-COLLAPSE SUPERNOVA EXPLOSIONS TRIGGERED BY A QUARK–HADRON PHASE TRANSITION DURING THE EARLY POST-BOUNCE PHASE

By Tobias Fischer, Irina Sagert, G. Pagliara, M. Hempel, J. Schaffner-Bielich, T. Rauscher, Friedrich-Karl Thielemann, R. Kappeli, G. Mart'inez-Pinedo, M. Liebendorfer. 2010

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We explore explosions of massive stars, which are triggered via the quark–hadron phase transition during the early post-bounce phase of core-collapse supernovae. We construct a quark equation of state, based on the bag model for strange quark matter. The transition between the hadronic and the quark phases is constructed applying Gibbs conditions. The resulting quark–hadron hybrid equations of state are used in core-collapse supernova simulations, based on general relativistic radiation hydrodynamics and three-flavor Boltzmann neutrino transport in spherical symmetry. The formation of a mixed phase reduces the adiabatic index, which induces the gravitational collapse of the central protoneutron star (PNS). The collapse halts in the pure quark phase, where the adiabatic index increases. A strong accretion shock forms, which propagates toward the PNS surface. Due to the density decrease of several orders of magnitude, the accretion shock turns into a dynamic shock with matter outflow. This moment defines the onset of the explosion in supernova models that allow for a quark–hadron phase transition, where otherwise no explosions could be obtained. The shock propagation across the neutrinospheres releases a burst of neutrinos. This serves as a strong observable identification for the structural reconfiguration of the stellar core. The ejected matter expands on a short timescale and remains neutron-rich. These conditions might be suitable for the production of heavy elements via the r-process. The neutron-rich material is followed by proton-rich neutrino-driven ejecta in the later cooling phase of the PNS where the νp-process might occur.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/8ecaab4bad23baff16d979e41d38bf0b044aac41

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Citations in the corpus

A new quark-hadron hybrid equation of state for astrophysics - I. High-mass twin compact stars (2014, background): “…quark matter, have also been very useful in astrophysical applications, e.g. in simulations of protoneutron star cooling (cf. Pons et al. 2001; Popov et al. 2006; Blaschke et al. 2013b) and simulations of core-collapse supernovae (cf. Sagert et al. 2009; Fischer et al. 2011; Nakazato et al. 2014).”
What can be learned from a future supernova neutrino detection (2017, background): “Simulations [187, 114, 188, 189, 190] indicate the sequence of events when a phase”
INTERACTING QUARK MATTER EQUATION OF STATE FOR COMPACT STARS (2013, background): “…and has since been employed in most investigations of hybrid and quark stars as well as core collapse supernovae (Berezhiani et al. 2003; Alford et al. 2005, 2007; Drago et al. 2007, 2013; Mintz et al. 2010; Fischer et al. 2011; Ozel et al. 2010; Weissenborn et al. 2011; Zdunik & Haensel 2012).”
NEW HYPERON EQUATIONS OF STATE FOR SUPERNOVAE AND NEUTRON STARS IN DENSITY-DEPENDENT HADRON FIELD THEORY (2014, background): “…possibly new particle degrees of freedom taken into account (Hempel & Schaffner-Bielich 2010; Raduta & Gulminelli 2010; Shen et al. 2010, 2011a,b; Fischer et al. 2011; Blinnikov et al. 2011; Hempel et al. 2012; Steiner et al. 2013; Fischer et al. 2014; Buyukcizmeci et al. 2013b; Togashi et al.…”
CORE-COLLAPSE SUPERNOVA EQUATIONS OF STATE BASED ON NEUTRON STAR OBSERVATIONS (2012, methodology): “These become abundant during the PNS contraction as the PNS domain occupied by quark matter grows continuously during the accretion phase (for details about the scenario, see Fischer et al. 2011).”
NEW EQUATIONS OF STATE IN SIMULATIONS OF CORE-COLLAPSE SUPERNOVAE (2011, methodology): “Similarly, several other extensions of the STOS table are available, either with the formation of hyperons (Ishizuka et al. 2008) or the inclusion of the QCD phase transition (Nakazato et al. 2008; Sagert et al. 2009; Fischer et al. 2011).”
THE r-PROCESS NUCLEOSYNTHESIS IN THE VARIOUS JET-LIKE EXPLOSIONS OF MAGNETOROTATIONAL CORE-COLLAPSE SUPERNOVAE (2015, background): “Another possibility is the alternative explosion mechanism induced by the quark-hadron phase transition (e.g., Sagert et al. 2009; Fischer et al. 2011; Nishimura et al. 2012b).”