The rise time of nearby type Ia supernovae

被引:212
作者
Riess, AG [1 ]
Filippenko, AV
Li, WD
Treffers, RR
Schmidt, BP
Qiu, YL
Hu, JY
Armstrong, M
Faranda, C
Thouvenot, E
Buil, C
机构
[1] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA
[2] Australian Natl Univ, Mt Stromlo & Siding Spring Observ, Weston, ACT 2611, Australia
[3] Chinese Acad Sci, Beijing Astron Observ, Beijing 100080, Peoples R China
[4] British Astron Assoc, UK Supernova Patrol, Rolvenden, England
[5] Ctr Natl Etud Spatiale Rayonnements, F-31401 Toulouse, France
关键词
cosmology : observations; supernovae : general;
D O I
10.1086/301143
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present calibrated photometric measurements of the earliest detections of nearby Type Ia supernovae (SNe Ia). The set of similar to 30 new, unfiltered CCD observations delineate the early rise behavior of SNe Ia 18 to 10 days before maximum. Using simple empirical models, we demonstrate the strong correlation between the rise time (i.e., the time between explosion and maximum), the postrise light-curve shape, and the peak luminosity. Using a variety of light-curve shape methods, we find the rise time to B maximum for an SN Ia with Delta m(15)(B)= 1.1 mag and peak M-v = -19.45;mag to be 19.5 +/- 0.2 days. We find that the peak brightness of SNe Ia is correlated with their rise time; SNe Ia that are 0.10 mag brighter at peak in the B band require 0.80 +/- 0.05 days longer to reach maximum light. We determine the effects of several possible sources of systematic errors, but none of these significantly impacts the inferred rise time. We explore the degree to which comparisons between the observed and theoretically predicted rise times constrain SN Ia progenitor systems.
引用
收藏
页码:2675 / 2688
页数:14
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