Type II-p supernovae from the SDSS-II supernova survey and the standardized candle method

Chris B. D'Andrea, Masao Sako, Benjamin Dilday, Joshua A. Frieman, Jon Holtzman, Richard Kessler, Kohki Konishi, D. P. Schneider, Jesper Sollerman, J. Craig Wheeler, Naoki Yasuda, David Cinabro, Saurabh Jha, Robert C. Nichol, Hubert Lampeitl, Mathew Smith, David W. Atlee, Bruce Bassett, Francisco J. Castander, Ariel GoobarRamon Miquel, Jakob Nordin, Linda Stman, José L. Prieto, Robert Quimby, Adam G. Riess, Maximilian Stritzinger

Research output: Contribution to journalArticlepeer-review

52 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)661-674
Number of pages14
JournalAstrophysical Journal
Volume708
Issue number1
DOIs
StatePublished - 2010

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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