Probing type Ia supernova properties using bolometric light curves from the Carnegie Supernova Project and the CfA Supernova Group. Issue 1 (29th November 2018)

• Record Type: Journal Article
• Authors: Scalzo, R A; Parent, E; Burns, C; Childress, M; Tucker, B E; Brown, P J; Contreras, C; Hsiao, E; Krisciunas, K; Morrell, N; Phillips, M M; Piro, A L; Stritzinger, M; Suntzeff, N
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 483:Issue 1(2019)
• Page Start: 628
• Page End: 647
• Publication Date: 2018-11-29
• Subjects: methods: statistical -- white dwarfs -- supernovae: general -- dark energy; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/sty3178
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: We present bolometric light curves constructed from multiwavelength photometry of Type Ia supernovae (SNe Ia) from the Carnegie Supernova Project and the CfA Supernova Group, using near-infrared observations to provide robust constraints on host galaxy dust extinction. This set of light curves form a well-measured reference set for comparison with theoretical models. Ejected mass and synthesized 56 Ni mass are inferred for each SN Ia from its bolometric light curve using a semi-analytic Bayesian light curve model, and fitting formulas provided in terms of light curve width parameters from the salt2 and SNooPy light curve fitters. A weak bolometric width–luminosity relation is confirmed, along with a correlation between ejected mass and the bolometric light curve width. SNe Ia likely to have sub-Chandrasekhar ejected masses belong preferentially to the broad-line and cool-photosphere spectroscopic subtypes, and have higher photospheric velocities and populate older, higher mass host galaxies than SNe Ia consistent with Chandrasekhar-mass explosions. Two peculiar events, SN 2006bt and SN 2006ot, have normal peak luminosities but appear to have super-Chandrasekhar ejected masses.