Imprints of r-process heating on fall-back accretion: distinguishing black hole-neutron star from double neutron star mergers

Dhruv Desai, Brian D. Metzger, Francois Foucart

Mergers of compact binaries containing two neutron stars (NS-NS), or a neutron star and a stellar-mass black hole (NS-BH), are likely progenitors of short-duration gamma ray bursts…