The standardized candle method for typeii 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

Research output: Contribution to journalArticlepeer-review

74 Citations (Scopus)

Abstract

In this paper, we study the "standardized candle method" using a sample of 37 nearby (redshift z < 0.06) TypeII 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 σ(AV ) = 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 (R V = 3.1), we obtain Hubble diagrams (HDs) in the BVI bands with dispersions of ∼ 0.4 mag. Allowing RV to vary and minimizing the spread in the HDs, 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.

Original languageEnglish
Pages (from-to)833-853
Number of pages21
JournalAstrophysical Journal
Volume715
Issue number2
DOIs
Publication statusPublished - 2010

Keywords

  • Distance scale
  • Galaxies: distances and redshifts
  • Supernovae: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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