Talk detail

Participant	Nomoto, Ken'ichi
Institution	Kavli IPMU, University of Tokyo - 5-1-5 Kashiwanoha - Kashiwa - Chiba - Japan

Session	BN4	Accepted		Order	Time
Talk	Oral abstract	Title	Progenitors of Type Ia Supernovae in the Single Degenerate Scenario
Coauthors
Abstract	I will present the evolution of uniformly rotating, mass-accreting white dwarfs (WDs) in the single degenerate scenario for Type Ia supernovae. For certain binary parameters, the WD increases its mass through the "effective" Chandrasekhar mass of the uniformly rotating WD, M(Ch, rot) and undergoes "prompt" carbon ignition. For nearby binary parameters, the WD mass exceeds the Chandrasekhar mass of the non-rotating WD but does not reach M(Ch, rot). Such a WD undergoes the evolution with angular momentum loss and "delayed" carbon ignition. During such a delay time, the companion evolves to become a He WD. Thus the missing companion problem of some Type Ia supernovae can be reconciled.
Pdf file

Session	PS	Accepted		Order	Time
Talk	Oral abstract	Title	First Stars, Hypernovae, and Faint Supernovae in the Early Universe
Coauthors
Abstract	After the Big Bang, production of heavy elements in the early universe takes place starting from the formation of the first stars, their evolution, and explosion. The nature of the first stars, first supernovae, and first black holes, however, has not been well clarified. The signature of nucleosynthesis yields of the first stars can be seen in the elemental abundance patterns observed in extremely metal-poor stars, which show interesting peculiarities relative to the solar abundance pattern. I will show those peculiar pattern is related to nucleosynthesis yields of jet-induced explosions, hypernovae associated with gamma-ray bursts, and possibly superluminous supernovae in the early universe.
Pdf file