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Rates and properties of type Ia supernovae as a function of mass and star-formation in their host galaxies

Abstract : (ABRIDGED) We show that Type Ia supernovae (SNe Ia) are formed within both very young and old stellar populations, with observed rates that depend on the stellar mass and mean star-formation rates (SFRs) of their host galaxies. Models where the SN Ia rate depends solely on host galaxy stellar mass are ruled out with 99% confidence. Our analysis is based on 100 spectroscopically-confirmed SNe Ia, plus 24 photometrically-classified events, all from the Supernova Legacy Survey (SNLS) and distributed over 0.2
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http://hal.in2p3.fr/in2p3-00087104
Contributor : Simone Lantz <>
Submitted on : Friday, July 21, 2006 - 11:44:42 AM
Last modification on : Saturday, September 19, 2020 - 4:53:15 AM

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M. Sullivan, D. Le Borgne, C. J. Pritchet, A. Hodsman, J. D. Neill, et al.. Rates and properties of type Ia supernovae as a function of mass and star-formation in their host galaxies. The Astrophysical Journal, American Astronomical Society, 2006, 648, pp.868-883. ⟨10.1086/506137⟩. ⟨in2p3-00087104⟩

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