The bimodality of type Ia Supernovae

F. Mannucci; N. Panagia; M. Della Valle

doi:10.1063/1.2803580

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arXiv · 0704.0877

The bimodality of type Ia Supernovae

F. Mannucci·N. Panagia·M. Della Valle

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Abstract

We comment on the presence of a bimodality in the distribution of delay time between the formation of the progenitors and their explosion as type Ia SNe. Two "flavors" of such bimodality are present in the literature: a "weak" bimodality, in which type Ia SNe must explode from both young and old progenitors, and a "strong" bimodality, in which about half of the systems explode within 10^8 years from formation. The "weak" bimodality is observationally based on the dependence of the rates with the host galaxy SFR, while the "strong" one on the different rates in radio-loud and radio-quiet early-type galaxies. We review the evidence for these bimodalities. Finally, we estimate the fraction of SNe which are missed by optical and near-IR searches because of dust extinction in massive starbursts.

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F. Mannucci, N. Panagia, M. Della Valle. 2007-07-04. The bimodality of type Ia Supernovae. https://doi.org/10.1063/1.2803580

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