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Time Dilation from Spectral Feature Age Measurements of Type IA Supernovae

Riess, Adam G; Filippenko, A V; Leonard, D C; Schmidt, Brian; Suntzeff, Nicholas B; Phillips, Mark M; Schommer, Robert; Clocchiatti, Alejandro; Kirshner, Robert P; Garnavich, Peter M; Challis, Peter M


We have developed a quantitative, empirical method for estimating the age of Type Ia supernovae (SNe Ia) from a single spectral epoch. The technique examines the goodness of fit of spectral features as a function of the temporal evolution of a large database of SNe Ia spectral features. When a SN Ia spectrum with good signal-to-noise ratio over the rest frame range 3800 to 6800 Angstroms \ is available, the precision of a spectral feature age (SFA) is (1sigma ) ~ 1.4 days. SFA estimates are...[Show more]

CollectionsANU Research Publications
Date published: 1997
Type: Journal article
Source: Astronomical Journal
DOI: 10.1086/118506
Access Rights: Open Access


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