Rights statement: © 2017. The American Astronomical Society. All rights reserved.
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - A Type II Supernova Hubble Diagram from the CSP-I, SDSS-II and SNLS Surveys
AU - de Jaeger, Thomas
AU - Gonzales-Gaitan, S.
AU - Hamuy, M.
AU - Galbany, L.
AU - Anderson, J. P.
AU - Phillips, M. M.
AU - Stritzinger, M. D.
AU - Carlberg, R. G.
AU - Sullivan, M.
AU - Gutierrez, C. P.
AU - Hook, Isobel
AU - Howell, D. Andrew
AU - Hsiao, E. Y.
AU - Kuncarayakti, H.
AU - Ruhlmann-Kleider, V.
AU - Folatelli, G.
AU - Pritchet, C.
AU - Basa, S.
N1 - © 2017. The American Astronomical Society. All rights reserved.
PY - 2017/1/27
Y1 - 2017/1/27
N2 - 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.
AB - 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.
KW - distance scale
KW - galaxies: distances and redshifts
KW - supernovae: general
U2 - 10.3847/1538-4357/835/2/166
DO - 10.3847/1538-4357/835/2/166
M3 - Journal article
VL - 835
JO - The Astrophysical Journal
JF - The Astrophysical Journal
SN - 0004-637X
IS - 2
M1 - 166
ER -