期刊
ASTROPHYSICAL JOURNAL
卷 715, 期 2, 页码 833-853出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/715/2/833
关键词
distance scale; galaxies: distances and redshifts; supernovae: general
资金
- Programa Bicentenario de Ciencia y Tecnologia de CONICYT [Pas06-045-F]
- Programa Iniciativa Cientifica Milenio de MIDEPLAN
- Centro de Astrofisica FONDAP [15010003]
- Fondecyt [1060808]
- NSF [AST-0607485, AST-0908886, AST-0606772]
- TABASGO Foundation
- Comite Mixto ESO-GOBIERNO DE CHILE
- Direct For Mathematical & Physical Scien [0908886] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [0907903] Funding Source: National Science Foundation
- Division Of Astronomical Sciences [0908886] Funding Source: National Science Foundation
In this paper, we study the standardized candle method using a sample of 37 nearby (redshift 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 sigma(A(V)) = 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 similar to 0.4 mag. Allowing R-V 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 R-V is 1.4 +/- 0.1.
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