Delay-time distribution of core-collapse supernovae with late events resulting from binary interaction

摘要: Most massive stars, the progenitors of core-collapse supernovae, are in close binary systems and may interact with their companion through mass transfer or merging. We undertake a population synthesis study to compute delay-time distribution that is, supernova rate versus time following starburst, taking into account interactions. test systematic robustness our results by running various simulations for uncertainties standard assumptions. find significant fraction, 15+9-8%, supernovae “late”, they occur 50–200 Myr after birth, when all single stars have already exploded. These late events originate predominantly from at least one, or, most cases, both initially being intermediate (4–8 M⊙). The main evolutionary channels contribute often involve either merging more primary star its engulfment remaining core expanding secondary has accreted an earlier stage. Also, total number increases 14+15-14% because binarity same initial stellar mass. high implies we should observed such but not recognized them as such. argue φ Persei is likely progenitor eccentric neutron – white dwarf descendants. Late can help explain discrepancy distributions derived remnants Magellanic Clouds extragalactic type Ia events, lowering contribution prompt events. discuss ways these predictions speculate on implications feedback galaxy evolution.