Probing type Ia supernova properties using bolometric light curves from the Carnegie Supernova Project and the CfA Supernova Group
Abstract
We present bolometric light curves constructed from multi-wavelength 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 Ni mass are inferred for each SN Ia from its bolometric light curve using a semi-analytic Bayesian light curve model, and fitting formulae 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.
Keywords
Cite
@article{arxiv.1811.08969,
title = {Probing type Ia supernova properties using bolometric light curves from the Carnegie Supernova Project and the CfA Supernova Group},
author = {Richard A. Scalzo and Emilie Parent and Christopher Burns and Michael J. Childress and Brad E. Tucker and Peter J. Brown and Carlos Contreras and Eric Hsiao and Kevin Krisciunas and Nidia Morrell and Mark M. Phillips and Anthony L. Piro and Maximilian Stritzinger and Nicholas Suntzeff},
journal= {arXiv preprint arXiv:1811.08969},
year = {2018}
}
Comments
26 pages, 14 figures; accepted to MNRAS. An online-only appendix in the MNRAS version is included as a supplemental appendix to the arXiv text; online-only tables, including bolometric light curves and MCMC inversion results, are included as ancillary files