We present a photometric study of 17 Type Ia supernovae (SNe) based on multi-color (Bessell BVRI) data taken at Piszkesteto mountain station of Konkoly Observatory, Hungary between 2016 and 2018. We analyze the light curves (LCs) using the publicly available LC-fitter SNooPy2 to derive distance and reddening information. The bolometric LCs are fit with a radiation-diffusion Arnett-model to get constraints on the physical parameters of the ejecta: the optical opacity, the ejected mass and the expansion velocity in particular. We also study the pre-maximum (B-V) color evolution by comparing our data with standard delayed detonation and pulsational delayed detonation models, and show that the Ni56 masses of the models that fit the (B-V) colors are consistent with those derived from the bolometric LC fitting. We find similar correlations between the ejecta parameters (e.g. ejecta mass, or Ni56 mass vs decline rate) as published recently by Scalzo et al. (2019).
@article{arxiv.1908.00582,
title = {Constraints on the physical properties of Type Ia supernovae from photometry},
author = {R. Konyves-Toth and J. Vinko and A. Ordasi and K. Sarneczky and A. Bodi and B. Cseh and G. Csornyei and Z. Dencs and O. Hanyecz and B. Ignacz and Cs. Kalup and L. Kriskovics and A. Pal and B. Seli and A. Sodor and R. Szakats and P. Szekely and E. Varga-Verebelyi and K. Vida and G. Zsidi},
journal= {arXiv preprint arXiv:1908.00582},
year = {2020}
}
Comments
28 pages, 14 figures, accepted for publication in ApJ