DEFINING PHOTOMETRIC PECULIAR TYPE Ia SUPERNOVAE

González Gaitán S.; Hsiao, EY; Pignata, G.; Forster, F; Gutierrez, CP; Bufano, F.; Galbany, L.; Folatelli, G; PHILLIPS, MM; Hamuy, M.; Anderson, JP; de Jaeger, T.

Keywords: supernovae: general, cosmology: miscellaneous

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

Más información

Título según WOS: DEFINING PHOTOMETRIC PECULIAR TYPE Ia SUPERNOVAE
Título según SCOPUS: Defining photometric peculiar type Ia supernovae
Título de la Revista: ASTROPHYSICAL JOURNAL
Volumen: 795
Número: 2
Editorial: IOP Publishing
Fecha de publicación: 2014
Página de inicio: 142
Idioma: English
DOI:

10.1088/0004-637X/795/2/142

Notas: ISI, SCOPUS