Details

Autor(en) / Beteiligte

• Jaeger, T. de
• González-Gaitán, S.
• Hamuy, M.
• Galbany, L.
• Anderson, J. P.
• Phillips, M. M.
• Stritzinger, M. D.
• Carlberg, R. G.
• Sullivan, M.
• Gutiérrez, C. P.
• Hook, I. M.
• Howell, D. Andrew
• Hsiao, E. Y.
• Kuncarayakti, H.
• Ruhlmann-Kleider, V.
• Folatelli, G.
• Pritchet, C.
• Basa, S.

Titel

A Type II Supernova Hubble Diagram from the CSP-I, SDSS-II, and SNLS Surveys This paper includes data gathered with the 6.5 m Magellan Telescopes, with the du Pont and Swope telescopes located at Las Campanas Observatory, Chile; and the Gemini Observatory, Cerro Pachon, Chile (Gemini Program N-2005A-Q-11, GN-2005B-Q-7, GN-2006A-Q-7, GS-2005A-Q-11, GS-2005B-Q-6, and GS-2008B-Q-56). Based on observations collected at the European Organization for Astronomical Research in the Southern Hemisphere, C

Ist Teil von

• The Astrophysical journal, 2017-01, Vol.835 (2)

Ort / Verlag

The American Astronomical Society

Erscheinungsjahr

2017

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The coming era of large photometric wide-field surveys will increase the detection rate of supernovae by orders of magnitude. Such numbers will restrict spectroscopic follow-up in the vast majority of cases, and hence new methods based solely on photometric data must be developed. Here, we construct a complete Hubble diagram of Type II supernovae (SNe II) combining data from three different samples: the Carnegie Supernova Project-I, the Sloan Digital Sky Survey II SN, and the Supernova Legacy Survey. Applying the Photometric Color Method (PCM) to 73 SNe II with a redshift range of 0.01-0.5 and with no spectral information, we derive an intrinsic dispersion of 0.35 mag. A comparison with the Standard Candle Method (SCM) using 61 SNe II is also performed and an intrinsic dispersion in the Hubble diagram of 0.27 mag, i.e., 13% in distance uncertainties, is derived. Due to the lack of good statistics at higher redshifts for both methods, only weak constraints on the cosmological parameters are obtained. However, assuming a flat universe and using the PCM, we derive the universe's matter density: providing a new independent evidence for dark energy at the level of two sigma.