The standardized candle method for typeii plateau supernovae
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Archivos
Fecha
2010
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
Institute of Physics Publishing
Nombre de Curso
Licencia CC
Licencia CC
Resumen
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. © 2010. The American Astronomical Society.
Notas
Indexación: Scopus.
Palabras clave
Distance Scale, Supernovae: general, Distance scale; Galaxies: distances and redshifts; Supernovae: general
Citación
Astrophysical Journal. Volume 715, Issue 2, Pages 833 - 853. 2010
DOI
10.1088/0004-637X/715/2/833