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Five Supernova Survey Galaxies in the Southern Hemisphere: Supernova Ia Rates

  • Hakobyan, A. A.
  • Petrosian, A. R.
  • Mamon, G. A.
  • McLean, B.
  • Kunth, D.
  • Turatto, M.
  • Cappellaro, E.
  • Mannucci, F.
  • Allen, R. J.
  • Panagia, N.
  • Della Valle, M.
  • Petrosyan, G. V.
Published Article
Publication Date
Jan 22, 2013
Submission Date
Jul 15, 2011
DOI: 10.1017/S1743921312014615
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Based on the database of 56 supernovae (SNe) events discovered in 3838 galaxies of the southern hemisphere, we compute the rate of SNe of different types along the Hubble sequence normalized to the optical and near-infrared (NIR) luminosities as well as to the stellar mass of the galaxies. We find that the rates of Type Ia SNe show a dependence on both morphology and colors of the galaxies, and therefore, on the star-formation activity. The rate of SNe Ia can be explained by assuming that at least 15% of Ia events in spiral galaxies originate in relatively young stellar populations. We also find that the rates show no modulation with nuclear activity or environment.

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