The Standardized Candle Method for Type II Plateau Supernovae
Abstract
In this paper we study the "standardized candle method" using a sample of 37 nearby (z<0.06) Type II plateau supernovae having BVRI photometry and optical spectroscopy. An analytic procedure is implemented to fit light curves, color curves, and velocity curves. We find that the V-I color toward the end of the plateau can be used to estimate the host-galaxy reddening with a precision of 0.2 mag. The correlation between plateau luminosity and expansion velocity previously reported in the literature is recovered. Using this relation and assuming a standard reddening law (Rv = 3.1), we obtain Hubble diagrams in the BVI bands with dispersions of ~0.4 mag. Allowing Rv to vary and minimizing the spread in the Hubble diagrams, we obtain a dispersion range of 0.25-0.30 mag, which implies that these objects can deliver relative distances with precisions of 12-14%. The resulting best-fit value of Rv is 1.4 +/- 0.1.
Keywords
Cite
@article{arxiv.1004.2534,
title = {The Standardized Candle Method for Type II Plateau Supernovae},
author = {Felipe Olivares E. and Mario Hamuy and Giuliano Pignata and José Maza and Melina Bersten and Mark M. Phillips and Nicholas B. Suntzeff and Alexei V. Filippenko and Nidia I. Morrel and Robert P. Kirshner and Thomas Matheson},
journal= {arXiv preprint arXiv:1004.2534},
year = {2010}
}
Comments
Accepted for publication in ApJ