Details

Autor(en) / Beteiligte

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

Titel

The Standardized Candle Method for Type II Plateau Supernovae

Ist Teil von

• The Astrophysical journal, 2010-06, Vol.715 (2), p.833-853

Ort / Verlag

United States: IOP Publishing

Erscheinungsjahr

2010

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• 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{sub 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{sub V} = 3.1), we obtain Hubble diagrams (HDs) in the BVI bands with dispersions of {approx}0.4 mag. Allowing R{sub 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{sub V} is 1.4 {+-} 0.1.