Digital.CSIC > Ciencia y Tecnologías Físicas > Instituto de Ciencias del Espacio (ICE) > (ICE) Artículos >




Open Access item Type II-P Supernovae from the SDSS-II Supernova Survey and the Standardized Candle Method

Authors:D'Andrea, Chris B.
Sako, Masao
Dilday, Benjamin
Frieman, Joshua A.
Holtzman, Jon
Kessler, Richard
Konishi, Kohki
Schneider, Donald P.
Sollerman, Jesper
Wheeler, J. Craig
Yasuda, Naoki
Cinabro, David
Jha, Saurabh
Nichol, Robert C.
Lampeitl, Hubert
Smith, Mathew
Atlee, David W.
Bassett, Bruce
Castander, Francisco Javier
Goobar, Ariel
Miquel, Ramon
Nordin, Jakob
Östman, Linda
Prieto, José L.
Quimby, Robert
Riess, Adam G.
Stritzinger, Maximilian
Keywords:Cosmology: observations, Distance scale, Supernovae: general, Surveys
Issue Date:Jan-2010
Publisher:American Astronomical Society
Citation:Astrophysical Journal 708 (1) : 661 (2010)
Abstract:We apply the Standardized Candle Method (SCM) for Type II Plateau supernovae (SNe II-P), which relates the velocity of the ejecta of a SN to its luminosity during the plateau, to 15 SNe II-P discovered over the three season run of the Sloan Digital Sky Survey-II Supernova Survey. The redshifts of these SNe—0.027 < z < 0.144—cover a range hitherto sparsely sampled in the literature; in particular, our SNe II-P sample contains nearly as many SNe in the Hubble flow (z > 0.01) as all of the current literature on the SCM combined. We find that the SDSS SNe have a very small intrinsic I-band dispersion (0.22 mag), which can be attributed to selection effects. When the SCM is applied to the combined SDSS-plus-literature set of SNe II-P, the dispersion increases to 0.29 mag, larger than the scatter for either set of SNe separately. We show that the standardization cannot be further improved by eliminating SNe with positive plateau decline rates, as proposed in Poznanski et al. We thoroughly examine all potential systematic effects and conclude that for the SCM to be useful for cosmology, the methods currently used to determine the Fe II velocity at day 50 must be improved, and spectral templates able to encompass the intrinsic variations of Type II-P SNe will be needed.
Description:Publicado en línea el 15 de diciembre de 2009.
Publisher version (URL):http://dx.doi.org/10.1088/0004-637X/708/1/661
E-ISSNmetadata.dc.identifier.doi = DOI:1538-4357
Appears in Collections:(ICE) Artículos

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.