Details

Autor(en) / Beteiligte

• Mannucci, F.
• Della Valle, M.
• Panagia, N.
• Cappellaro, E.
• Cresci, G.
• Maiolino, R.
• Petrosian, A.
• Turatto, M.

Titel

The supernova rate per unit mass

Ist Teil von

• Astronomy and astrophysics (Berlin), 2005-04, Vol.433 (3), p.807-814

Ort / Verlag

Les Ulis: EDP Sciences

Erscheinungsjahr

2005

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• We compute the rate of supernovae (SNe) of different types along the Hubble sequence normalized to the near-infrared luminosity and to the stellar mass of the parent galaxies. This is made possible by the new complete catalog of near-infrared galaxy magnitudes obtained by 2MASS. We find that the rates of all SN types, including Ia, Ib/c and II, show a sharp dependence on both the morphology and the ($B-K$) colors of the parent galaxies and, therefore, on the star formation activity. In particular we find, with a high statistical significance, that the type Ia rate in late type galaxies is a factor ~20 higher than in E/S0. Similarly, the type Ia rate in the galaxies bluer than $B-K=2.6$ is about a factor of 30 larger than in galaxies with $B-K>4.1$. These findings can be explained by assuming that a significant fraction of Ia events in late spirals/irregulars originates in a relatively young stellar component.