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Time Dilation in Type Ia Supernova Spectra at High Redshift

Blondin, Stephanie; Davis, T M; Krisciunas, Kevin; Sollerman, Jesper; Wood-Vasey, W. Michael; Becker, Andrew C; Challis, Peter M; Clocchiatti, Alejandro; Damke, Guillermo; Filippenko, Alexei; Foley, Ryan; Tucker , Bradley

Description

We present multiepoch spectra of 13 high-redshift Type Ia supernovae (SNe Ia) drawn from the literature, the ESSENCE and SNLS projects, and our own separate dedicated program on the ESO Very Large Telescope. We use the Supernova Identification (SNID) code of Blondin and Tonry to determine the spectral ages in the supernova rest frame. Comparison with the observed elapsed time yields an apparent aging rate consistent with the 1 /(1 + z) factor (where z is the redshifi) expected in a homogeneous,...[Show more]

CollectionsANU Research Publications
Date published: 2008
Type: Journal article
URI: http://hdl.handle.net/1885/26392
Source: Astrophysical Journal, The
DOI: 10.1086/589568

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