Time Dilation in Type Ia Supernova Spectra at High Redshift
Time Dilation in Type Ia Supernova Spectra at High Redshift
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 …