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First-Year Sloan Di...
First-Year Sloan Digital Sky Survey-II Supernova Results : Hubble Diagram and Cosmological Parameters
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Kessler, Richard (author)
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Becker, Andrew C. (author)
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Cinabro, David (author)
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show more...
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Vanderplas, Jake (author)
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Frieman, Joshua A. (author)
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Marriner, John (author)
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Davis, Tamara M. (author)
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Dilday, Benjamin (author)
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Holtzman, Jon (author)
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Jha, Saurabh W. (author)
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Lampeitl, Hubert (author)
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Sako, Masao (author)
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Smith, Mathew (author)
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Zheng, Chen (author)
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Nichol, Robert C. (author)
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Bassett, Bruce (author)
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Bender, Ralf (author)
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Depoy, Darren L. (author)
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Doi, Mamoru (author)
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Elson, Ed (author)
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Filippenko, Alexei V. (author)
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Foley, Ryan J. (author)
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Garnavich, Peter M. (author)
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Hopp, Ulrich (author)
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Ihara, Yutaka (author)
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Ketzeback, William (author)
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Kollatschny, W. (author)
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Konishi, Kohki (author)
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Marshall, Jennifer L. (author)
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Mc Millan, Russet J. (author)
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Miknaitis, Gajus (author)
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Morokuma, Tomoki (author)
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- Mörtsell, Edvard (author)
- Stockholms universitet,Fysikum
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Pan, Kaike (author)
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Prieto, Jose Luis (author)
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Richmond, Michael W. (author)
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Riess, Adam G. (author)
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Romani, Roger (author)
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Schneider, Donald P. (author)
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- Sollerman, Jesper, 1968- (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Takanashi, Naohiro (author)
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Tokita, Kouichi (author)
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van der Heyden, Kurt (author)
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Wheeler, J. C. (author)
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Yasuda, Naoki (author)
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York, Donald (author)
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(creator_code:org_t)
- 2009-10-14
- 2009
- English.
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In: Astrophysical Journal Supplement Series. - : American Astronomical Society. - 0067-0049 .- 1538-4365. ; 185:1, s. 32-84
- Related links:
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https://espace.libra...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- 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(-AV /τV), 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.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- cosmological parameters
- cosmology: observations
- distance scale
- methods: data analysis
- supernovae: general
- surveys
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Kessler, Richard
-
Becker, Andrew C ...
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Cinabro, David
-
Vanderplas, Jake
-
Frieman, Joshua ...
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Marriner, John
-
show more...
-
Davis, Tamara M.
-
Dilday, Benjamin
-
Holtzman, Jon
-
Jha, Saurabh W.
-
Lampeitl, Hubert
-
Sako, Masao
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Smith, Mathew
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Zheng, Chen
-
Nichol, Robert C ...
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Bassett, Bruce
-
Bender, Ralf
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Depoy, Darren L.
-
Doi, Mamoru
-
Elson, Ed
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Filippenko, Alex ...
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Foley, Ryan J.
-
Garnavich, Peter ...
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Hopp, Ulrich
-
Ihara, Yutaka
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Ketzeback, Willi ...
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Kollatschny, W.
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Konishi, Kohki
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Marshall, Jennif ...
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Mc Millan, Russe ...
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Miknaitis, Gajus
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Morokuma, Tomoki
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Mörtsell, Edvard
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Pan, Kaike
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Prieto, Jose Lui ...
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Richmond, Michae ...
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Riess, Adam G.
-
Romani, Roger
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Schneider, Donal ...
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Sollerman, Jespe ...
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Takanashi, Naohi ...
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Tokita, Kouichi
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van der Heyden, ...
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Wheeler, J. C.
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Yasuda, Naoki
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York, Donald
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Stockholm University