Constraining Cosmic Evolution of Type Ia Supernovae
Foley, Ryan; Filippenko, Alexei; Aguilera, Claudio; Becker, Andrew C; Blondin, Stephanie; Challis, Peter M; Clocchiatti, Alejandro; Covarrubias, Ricardo; Davis, T M; Garnavich, Peter M; Jha, Saurabh; Schmidt, Brian
We present a large-scale effort of creating composite spectra of high-redshift SNe la and comparing them to low-redshift counterparts in an attempt to understand possible cosmic evolution of SNe la, which has major implications for studies of dark energy. Through the ESSENCE project, we have obtained 107 spectra of 88 high-redshift SNe la with excellent light-curve information. In addition, we have obtained 397 spectra of low-redshift SNe la through a multiple-decade effort at the Lick and Keck...[Show more]
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|Source:||Astrophysical Journal, The|
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