Speaker
Description
The coalescence of a binary system of neutron stars represents a natural laboratory to study hot and ultra-dense matter. Under these extreme conditions, exotic species like hyperons may be present. In this work, we present a comprehensive study of hyperons in neutron star mergers, focusing on the thermal impact they have on the Equation of State. The presence of the hyperons in a hot dense matter produces a significant drop of the thermal pressure. This effect consequently leaves a trace in the observables that can be measured. In particular, we identify that hyperonic equations of state produce a characteristic increase of the dominant postmerger gravitational-wave frequency by up to ∼ 150 Hz compared to purely nucleonic EoS models. Our findings provide an important analysis tool to finally give an answer to the longstanding question: are hyperons present in ultra dense matter?
