BN4 - End of white dwarfs and type Ia Supernova |
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Speaker |
Maeda, Keiichi |
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| Talk Title |
Links between SN Ia Observations and Progenitor Evolutions |
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Abstract |
In this talk, we will present recent observational insights on nucleosynthesis products at and binary / circumstellar (CSM) environments around type Ia supernovae (SNe Ia) and connect these informations to yet unclarified progenitor evolutions toward SN Ia explosions. Nucleosynthetic products provide clues to the explosion mechanisms which are then connected to different evolution scenarios; we will focus on the production of stable Fe-peak elements which especially diagnose the initiation of a deflagration flame thus the mass of exploding white dwarfs. Existence of a binary companion is a feature to distinguish so-called single degenerate and double degenerate scenarios; we will discuss how very early and late-phase observations can be used to probe companion stars. Finally, properties of CSM are linked to the mass-loss from the progenitor systems in the final centuries toward the explosion; we will present some new limits on the amount of CSM in nearby SNe Ia. |
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