Rates and Properties of Type Ia Supernovae as a Function of Mass and Star Formation in Their Host Galaxies
Author(s) -
M. Sullivan,
D. Le Borgne,
C. J. Pritchet,
A. Hodsman,
James D. Neill,
D. A. Howell,
R. G. Carlberg,
P. Astier,
É. Aubourg,
D. D. Balam,
S. Basa,
A. Conley,
S. Fabbro,
D. Fouchez,
J. Guy,
I. Hook,
R. Pain,
N. PalanqueDelabrouille,
K. Perrett,
N. Regnault,
J. Rich,
R. Taillet,
S. Baumont,
J. Bronder,
Richard S. Ellis,
M. Filiol,
V. Lusset,
S. Perlmutter,
P. Ripoche,
C. Tao
Publication year - 2006
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/506137
Subject(s) - supernova , astrophysics , galaxy , star formation , star (game theory) , physics , initial mass function , host (biology) , astronomy , biology , ecology
Accepted for publication in ApJ(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.
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