Strange matter in core-collapse supernovae

TL;DR

This paper explores how the presence of strange quark matter could influence the evolution and explosion mechanism of core-collapse supernovae, potentially leading to observable signals and affecting neutron star properties.

Contribution

It introduces the concept that strange quark matter may cause a second shock wave in supernovae, impacting explosion dynamics and neutrino signals.

Findings

Strange quark matter can induce a second shock wave in supernovae.

The collapse to a hybrid star affects neutrino emissions.

Results are consistent with recent neutron star mass observations.

Abstract

We discuss the possible impact of strange quark matter on the evolution of core-collapse supernovae with emphasis on low critical densities for the quark-hadron phase transition. For such cases the hot proto-neutron star can collapse to a more compact hybrid star configuration hundreds of milliseconds after core-bounce. The collapse triggers the formation of a second shock wave. The latter leads to a successful supernova explosion and leaves an imprint on the neutrino signal. These dynamical features are discussed with respect to their compatibility with recent neutron star mass measurements which indicate a stiff high density nuclear matter equation of state.