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Generalized Spectral Correlations of Type Ia Supernovae from the Nearby Supernova Factory

Abstract : 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.
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http://hal.in2p3.fr/in2p3-00589503
Contributor : Sylvie Flores <>
Submitted on : Friday, April 29, 2011 - 7:56:28 AM
Last modification on : Friday, April 10, 2020 - 5:23:35 PM

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S.J. Bailey, G. Aldering, P. Antilogus, C. Aragon, C. Baltay, et al.. Generalized Spectral Correlations of Type Ia Supernovae from the Nearby Supernova Factory. 213th Meeting of the American Astronomical Society with HAD and HEAD, Jan 2009, Long Beach, CA, United States. pp.376. ⟨in2p3-00589503⟩

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