| Autor: |
Bronder, T. J., Hook, I., Howell, D. A., Sullivan, M., Perrett, K., Conley, A., Astier, P., Basa, S., Carlberg, R. G., Guy, J., Pain, R., Pritchet, C. J., Neill, James D. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 8/21/2007, Vol. 924 Issue 1, p415-420, 6p, 3 Graphs |
| Abstrakt: |
Quantitative analysis of 24 high-z (zmed = 0.81) Type Ia supernovae (SNe Ia) spectra observed at the Gemini Telescopes for the Supernova Legacy Survey (SNLS) is presented. This analysis includes equivalent width measurements of SNe Ia-specific absorption features with methods tailored to the reduced signal-to-noise and host galaxy contamination present in these distant spectra. The results from this analysis are compared to corresponding measurements of a large set of low-z SNe Ia from the literature. This comparison showed no significant difference (less than 2σ) between the spectroscopic features of the distant and nearby SNe; a result that supports the assumption that SNe Ia are not evolving with redshift. Additionally, a new correlation between SiII absorption (observed near peak luminosity) and SNe Ia peak magnitudes is presented. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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