Gravitational waves from hot neutron stars and properties of ultra-dense matter – GW-HNS

GW170817, the first detection of gravitational waves (GWs) from a
binary neutron star merger together with its electromagnetic
counterpart has proven the immense potential of this multi-messenger
astronomy for our understanding of the nature of gravity and the
properties of dense matter. We propose here to advance on the latter,
addressing the following questions: To which extent can current and
future GW observations constrain the underlying microphysics,
specifically the equation of state and neutrino interaction rates? Can
a potential phase transition be detected? To answer these questions we
will study as well the remnant of binary neutron star mergers as
proto-neutron stars, the compact postbounce objects in a core-collapse
supernova with a new fast and flexible numerical tool. We shall
largely explore the microphysics model's parameter space and simulate
the possible imprints on GW emission from these objects. In view of
the difficult GW data analysis, this work will be crucial to fully
exploit the science of upcoming GW data.