The rise time of Type Ia supernovae from the Supernova Legacy Survey

被引：88
|
作者：
Conley, A.
Howell, D. A.
Howes, A.
Sullivan, M.
Astier, P.
Balam, D.
Basa, S.
Carlberg, R. G.
Fouchez, D.
Guy, J.
Hook, I.
Neill, J. D.
Pain, R.
Perrett, K.
Pritchet, C. J.
Regnault, N.
Rich, J.
Taillet, R.
Aubourg, E.
Bronder, J.
Ellis, R. S.
Fabbro, S.
Filiol, M.
Le Borgne, D.
Palanque-Delabrouille, N.
Perlmutter, S.
Ripoche, P.
机构：
[1] Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H4, Canada
[2] CNRS, IN2P3, LPNHE, F-75005 Paris, France
[3] Univ Paris 06, F-75005 Paris, France
[4] Univ Paris 07, F-75005 Paris, France
[5] Univ Victoria, Dept Phys & Astron, Victoria, BC V8W 3P6, Canada
[6] CNRS, LAM, F-13376 Marseille 12, France
[7] CNRS, IN2P3, CPPM, F-13288 Marseille 9, France
[8] Univ Aix Marseille 2, F-13288 Marseille 9, France
[9] Univ Oxford, Oxford OX1 3RH, England
[10] CEA Saclay, DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, France
[11] Univ Savoie, F-73000 Chambery, France
[12] AstroParticule & Cosmol, F-75231 Paris, France
[13] CALTECH, Pasadena, CA 91125 USA
[14] Univ Tecn Lisboa, CENTRA, Ctr Multidisciplinar Astrofis, IST, P-1049 Lisbon, Portugal
[15] Lawrence Berkeley Lab, Berkeley, CA 94720 USA
来源：
ASTRONOMICAL JOURNAL | 2006年 / 132卷 / 04期
关键词：
cosmology : observations; supernovae : general;
D O I：
10.1086/507788
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We compare the rise times of nearby and distant Type Ia supernovae (SNe Ia) as a test for evolution using 73 high-redshift spectroscopically confirmed SNe Ia from the first 2 years of the 5 year Supernova Legacy Survey (SNLS) and published observations of nearby SNe. Because of the "rolling" search nature of the SNLS, our measurement is approximately 6 times more precise than previous studies, allowing for a more sensitive test of evolution between nearby and distant SNe. Adopting a simple t(2) early-time model (as in previous studies), we find that the rest-frame B rise times for a fiducial SN Ia at high and low redshift are consistent, with values 19.10(-0.17)(+0.18) (stat) +/- 0.2(syst) and 19.58(-0.19)(+0.22) days, respectively; the statistical significance of this difference is only 1.4 sigma. The errors represent the uncertainty in the mean rather than any variation between individual SNe. We also compare subsets of our high-redshift data set based on decline rate, host galaxy star formation rate, and redshift, finding no substantive evidence for any subsample dependence.
引用
收藏
页码：1707 / 1713
页数：7
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