The Rise Time of Type Ia Supernovae from the Supernova Legacy Survey

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dc.creatorConley, A.
dc.creatorHowell, D. A.
dc.creatorHowes, A.
dc.creatorSullivan, M.
dc.creatorAstier, P.
dc.creatorBalam, D.
dc.creatorBasa, S.
dc.creatorCarlberg, R. G.
dc.creatorFouchez, D.
dc.creatorGuy, J.
dc.creatorHook, I.
dc.creatorNeill, J. D.
dc.creatorPain, R.
dc.creatorPerrett, K.
dc.creatorPritchet, C. J.
dc.creatorRegnault, N.
dc.creatorRich, J.
dc.creatorTaillet, R.
dc.creatorAubourg, E.
dc.creatorBronder, J.
dc.creatorEllis, R. S.
dc.creatorFabbro, S.
dc.creatorFiliol, M.
dc.creatorBorgne, D. Le
dc.creatorPalanque-Delabrouille, N.
dc.creatorPerlmutter, S.
dc.creatorRipoche, P.
dc.date2006-07-17
dc.date2006-09-20
dc.date.accessioned2026-07-07T11:57:25Z
dc.date.available2026-07-07T11:57:25Z
dc.descriptionWe 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 two years of the five year Supernova Legacy Survey (SNLS) and published observations of nearby SN. 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 supernovae. 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 $19.10^{+0.18}_{-0.17}({stat}) \pm 0.2 ({syst})$ and $19.58^{+0.22}_{-0.19}$ days, respectively; the statistical significance of this difference is only 1.4 \sg . The errors represent the uncertainty in the mean rather than any variation between individual SN. 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.
dc.descriptionAccepted for publication in AJ; minor changes (spelling and grammatical) to conform with published version
dc.identifierhttps://arxiv.org/abs/astro-ph/0607363
dc.identifierhttp://arxiv.org/abs/astro-ph/0607363
dc.identifierAstron.J.132:1707-1713,2006
dc.identifierdoi:10.1086/507788
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/205877
dc.subjectAstrophysics
dc.titleThe Rise Time of Type Ia Supernovae from the Supernova Legacy Survey
dc.typetext

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