First-year sloan digital sky survey-II supernova results: Hubble diagram and cosmological parameters

Kessler, Richard, Becker, Andrew C., Cinabro, David, Vanderplas, Jake, Frieman, Joshua A., Marriner, John, Davis, Tamara M., Dilday, Benjamin, Holtzman, Jon, Jha, Saurabh W., Lampeitl, Hubert, Sako, Masao, Smith, Mathew, Zheng, Chen, Nichol, Robert C., Bassett, Bruce, Bender, Ralf, Depoy, Darren L., Doi, Mamoru, Elson, Ed, Filippenko, Alexei V., Foley, Ryan J., Garnavich, Peter M., Hopp, Ulrich, Ihara, Yutaka, Ketzeback, William, Kollatschny, W., Konishi, Kohki, Marshall, Jennifer L., McMillan, Russet J., Miknaitis, Gajus, Morokuma, Tomoki, Mortsell, Edvard, Pan, Kaike, Prieto, Jose Luis, Richmond, Michael W., Riess, Adam G., Romani, Roger, Schneider, Donald P., Sollerman, Jesper, Takanashi, Naohiro, Tokita, Kouichi, van der Heyden, Kurt, Wheeler, J. C., Yasuda, Naoki and York, Donald (2009) First-year sloan digital sky survey-II supernova results: Hubble diagram and cosmological parameters. Astrophysical Journal Supplement Series, 185 1: 32-84. doi:10.1088/0067-0049/185/1/32

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Author Kessler, Richard
Becker, Andrew C.
Cinabro, David
Vanderplas, Jake
Frieman, Joshua A.
Marriner, John
Davis, Tamara M.
Dilday, Benjamin
Holtzman, Jon
Jha, Saurabh W.
Lampeitl, Hubert
Sako, Masao
Smith, Mathew
Zheng, Chen
Nichol, Robert C.
Bassett, Bruce
Bender, Ralf
Depoy, Darren L.
Doi, Mamoru
Elson, Ed
Filippenko, Alexei V.
Foley, Ryan J.
Garnavich, Peter M.
Hopp, Ulrich
Ihara, Yutaka
Ketzeback, William
Kollatschny, W.
Konishi, Kohki
Marshall, Jennifer L.
McMillan, Russet J.
Miknaitis, Gajus
Morokuma, Tomoki
Mortsell, Edvard
Pan, Kaike
Prieto, Jose Luis
Richmond, Michael W.
Riess, Adam G.
Romani, Roger
Schneider, Donald P.
Sollerman, Jesper
Takanashi, Naohiro
Tokita, Kouichi
van der Heyden, Kurt
Wheeler, J. C.
Yasuda, Naoki
York, Donald
Title First-year sloan digital sky survey-II supernova results: Hubble diagram and cosmological parameters
Journal name Astrophysical Journal Supplement Series   Check publisher's open access policy
ISSN 0067-0049
1538-4365
Publication date 2009-10-14
Year available 2009
Sub-type Article (original research)
DOI 10.1088/0067-0049/185/1/32
Open Access Status File (Publisher version)
Volume 185
Issue 1
Start page 32
End page 84
Total pages 53
Editor Ethan T. Vishniac
Place of publication Philadelphia, PA, United States
Publisher Institute of Physics Publishing
Collection year 2010
Language eng
Formatted abstract
We present measurements of the Hubble diagram for 103 Type Ia supernovae (SNe) with redshifts 0.04 < z < 0.42, discovered during the first season (Fall 2005) of the Sloan Digital Sky Survey-II (SDSS-II) Supernova Survey. These data fill in the redshift "desert" between low- and high-redshift SN Ia surveys. Within the framework of the MLCS2K2 light-curve fitting method, we use the SDSS-II SN sample to infer the mean reddening parameter for host galaxies, RV = 2.18 ± 0.14stat ± 0.48syst, and find that the intrinsic distribution of host-galaxy extinction is well fitted by an exponential function, P(AV) = exp(–AVV), with τV = 0.334 ± 0.088 mag. We combine the SDSS-II measurements with new distance estimates for published SN data from the ESSENCE survey, the Supernova Legacy Survey (SNLS), the Hubble Space Telescope (HST), and a compilation of Nearby SN Ia measurements. A new feature in our analysis is the use of detailed Monte Carlo simulations of all surveys to account for selection biases, including those from spectroscopic targeting. Combining the SN Hubble diagram with measurements of baryon acoustic oscillations from the SDSS Luminous Red Galaxy sample and with cosmic microwave background temperature anisotropy measurements from the Wilkinson Microwave Anisotropy Probe, we estimate the cosmological parameters w and ΩM, assuming a spatially flat cosmological model (FwCDM) with constant dark energy equation of state parameter, w. We also consider constraints upon ΩM and ΩΛ for a cosmological constant model (ΛCDM) with w = –1 and non-zero spatial curvature. For the FwCDM model and the combined sample of 288 SNe Ia, we find w = –0.76 ± 0.07(stat) ± 0.11(syst), ΩM = 0.307 ± 0.019(stat) ± 0.023(syst) using MLCS2K2 and w = –0.96 ± 0.06(stat) ± 0.12(syst), ΩM = 0.265 ± 0.016(stat) ± 0.025(syst) using the SALT-II fitter. We trace the discrepancy between these results to a difference in the rest-frame UV model combined with a different luminosity correction from color variations; these differences mostly affect the distance estimates for the SNLS and HST SNe. We present detailed discussions of systematic errors for both light-curve methods and find that they both show data-model discrepancies in rest-frame U band. For the SALT-II approach, we also see strong evidence for redshift-dependence of the color-luminosity parameter (β). Restricting the analysis to the 136 SNe Ia in the Nearby+SDSS-II samples, we find much better agreement between the two analysis methods but with larger uncertainties: w = –0.92 ± 0.13(stat)+0.10 –0.33(syst) for MLCS2K2 and w = –0.92 ± 0.11(stat)+0.07–0.15 (syst) for SALT-II.
Keyword cosmological parameters
cosmology: observations
distance scale
methods: data analysis
supernovae: general
surveys
southern spectrophotometric standards
high-redshift supernovae
1A supernovae
dark energy
space-telescope
accelerating universe
extinction curves
legacy survey
k-corrections
data release
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
2010 Higher Education Research Data Collection
 
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Created: Sun, 22 Nov 2009, 00:08:45 EST