TY - JOUR
T1 - The rise time of nearby type Ia supernovae
AU - Riess, Adam G.
AU - Filippenko, Alexei V.
AU - Li, Weidong
AU - Treffers, Richard R.
AU - Schmidt, Brian P.
AU - Qiu, Yulei
AU - Hu, Jingyao
AU - Armstrong, Mark
AU - Faranda, Chuck
AU - Thouvenot, Eric
AU - Buil, Christian
PY - 1999/12
Y1 - 1999/12
N2 - We present calibrated photometric measurements of the earliest detections of nearby Type Ia supernovae (SNe Ia). The set of ∼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 Δm15(B) = 1.1 mag and peak Mv = -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.
AB - We present calibrated photometric measurements of the earliest detections of nearby Type Ia supernovae (SNe Ia). The set of ∼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 Δm15(B) = 1.1 mag and peak Mv = -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.
KW - Cosmology: observations
KW - Supernovae: general
UR - http://www.scopus.com/inward/record.url?scp=0001291881&partnerID=8YFLogxK
U2 - 10.1086/301143
DO - 10.1086/301143
M3 - Article
SN - 0004-6256
VL - 118
SP - 2675
EP - 2688
JO - Astronomical Journal
JF - Astronomical Journal
IS - 6
ER -