Home > Research > Publications & Outputs > A Type II Supernova Hubble Diagram from the CSP...

### Electronic data

• 1612.05636v1

Accepted author manuscript, 1.53 MB, PDF document

## A Type II Supernova Hubble Diagram from the CSP-I, SDSS-II and SNLS Surveys

Research output: Contribution to journalJournal articlepeer-review

Published
• Thomas de Jaeger
• S. Gonzales-Gaitan
• M. Hamuy
• L. Galbany
• J. P. Anderson
• M. M. Phillips
• M. D. Stritzinger
• R. G. Carlberg
• M. Sullivan
• C. P. Gutierrez
• Isobel Hook
• D. Andrew Howell
• E. Y. Hsiao
• H. Kuncarayakti
• V. Ruhlmann-Kleider
• G. Folatelli
• C. Pritchet
• S. Basa
Close
Article number 166 27/01/2017 The Astrophysical Journal 2 835 17 Published English

### Abstract

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: ${{\rm{\Omega }}}_{m}={0.32}_{-0.21}^{+0.30}$ providing a new independent evidence for dark energy at the level of two sigma.