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213th Meeting of the American Astronomical Society with HAD and HEAD, Long Beach, CA : États-Unis (2009)
Generalized Spectral Correlations of Type Ia Supernovae from the Nearby Supernova Factory
S.J. Bailey1, G. Aldering, P. Antilogus1, C. Aragon, C. Baltay, S. Bongard1, C. Buton2, M. Childress, N. Chotard2, Y. Copin2, E. Gangler2, S. Loken, P. Nugent, R. Pain1, E. Pecontal3, R. Pereira1, S. Perlmutter, D. Rabinowitz, G. Rigaudier3, P. Ripoche1, K. Runge, R. Scalzo, G. Smadja2, C. Tao2, R. Thomas, C. Wu1

We present a generalized correlation analysis of type Ia supernova spectra with a focus on spectral features that correlate with absolute magnitude in ways that are not already accounted for by color and lightcurve stretch. The results reveal new spectral correlations beyond those of the classic metrics of feature ratios (RSi, RSiS, RCa, EDCa). These new correlations could be used to improve the calibration of type Ia supernovae for cosmology measurements beyond what is possible with stretch and color alone.
1 :  LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
2 :  IPNL - Institut de Physique Nucléaire de Lyon
3 :  CRAL - Centre de Recherche Astrophysique de Lyon
Physique/Astrophysique/Astrophysique galactique

Planète et Univers/Astrophysique/Astrophysique galactique

Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique

Physique/Astrophysique/Cosmologie et astrophysique extra-galactique