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arXiv · 1004.2534

The Standardized Candle Method for Type II Plateau Supernovae

Felipe Olivares E.·Mario Hamuy·Giuliano Pignata·José Maza·Melina Bersten·Mark M. Phillips·Nicholas B. Suntzeff·Alexei V. Filippenko·Nidia I. Morrel·Robert P. Kirshner·Thomas Matheson
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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.

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Felipe Olivares E., Mario Hamuy, Giuliano Pignata, José Maza, Melina Bersten, Mark M. Phillips, Nicholas B. Suntzeff, Alexei V. Filippenko, Nidia I. Morrel, Robert P. Kirshner, Thomas Matheson. 2010-04-15. The Standardized Candle Method for Type II Plateau Supernovae. https://doi.org/10.1088/0004-637x%2F715%2F2%2F833

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