Speaker
Description
The importance of GW170817 for equation of state constraints was immediately obvious after the event with various ideas that were proposed to learn about the properties of high-density matter. Recently, we proposed another method that leads to interesting constraints on the properties of neutron stars and the merger remnant. This is based on the consideration of the helium content in the ejecta. If helium is not very abundant as potentially suggested by a preliminary analysis of the kilonova spectra, the life time of the merger remnant is likely to be relatively short. This implies upper limits on the radii and the maximum mass of neutron stars. We will discuss a new signature in stellar parameters of isolated neutron stars that indicates the presence of hyperons in the stellar core as well as the impact of hyperons in neutron star mergers.