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Date and Time of the Query: 2019-03-24 T09:04:17 PDT
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For refcode 2014ApJ...795..142G:
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2014ApJ...795..142G Defining Photometric Peculiar Type Ia Supernovae Gonzalez-Gaitan, S.; Hsiao, E. Y.; Pignata, G.; Forster, F.; Gutierrez, C. P.; Bufano, F.; Galbany, L.; Folatelli, G.; Phillips, M. M.; Hamuy, M.; Anderson, J. P.; de Jaeger, T. Abstract. We present a new photometric identification technique for SN 1991bg-like type Ia supernovae (SNe Ia), i.e., objects with light curve characteristics such as later primary maxima and the absence of a secondary peak in redder filters. This method is capable of selecting this sub-group from the normal type Ia population. Furthermore, we find that recently identified peculiar sub-types such as SNe Iax and super-Chandrasekhar SNe Ia have photometric characteristics similar to 91bg-like SNe Ia, namely, the absence of secondary maxima and shoulders at longer wavelengths, and can also be classified with our technique. The similarity of these different SN Ia sub-groups perhaps suggests common physical conditions. This typing methodology permits the photometric identification of peculiar SNe Ia in large upcoming wide-field surveys either to study them further or to obtain a pure sample of normal SNe Ia for cosmological studies. Key words: cosmology: miscellaneous, supernovae: general
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