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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
First-year Sloan Digital Sky Survey-II supernova results: Consistency and constraints with other intermediate-redshift data sets
Monthly Notices of the Royal Astronomical Society, Volume 401, No. 4, Year 2010
Notification
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Description
We present an analysis of the luminosity distances of Type Ia Supernovae (SNe) from the Sloan Digital Sky Survey-II (SDSS-II) SN Survey in conjunction with other intermediate-redshift (z < 0.4) cosmological measurements including redshift-space distortions from the Two-Degree Field Galaxy Redshift Survey (2dFGRS), the integrated Sachs-Wolfe (ISW) effect seen by the SDSS and the latest baryon acoustic oscillation (BAO) distance scale from both the SDSS and 2dFGRS. We have analysed the SDSS-II SN data alone using a variety of 'model-independent' methods and find evidence for an accelerating Universe at a >97 per cent level from this single data set. We find good agreement between the SN and BAO distance measurements, both consistent with a Λ-dominated cold dark matter cosmology, as demonstrated through an analysis of the distance duality relationship between the luminosity (dL) and angular diameter (dA) distance measures. We then use these data to estimate w within this restricted redshift range (z < 0.4). Our most stringent result comes from the combination of all our intermediate-redshift data (SDSS-II SNe, BAO, ISW and redshift-space distortions), giving w = -0.81+0.16-0.18 (stat) ± 0.15 (sys) and ΩM = 0.22 +0.09-0.08 assuming a flat universe. This value of w and associated errors only change slightly if curvature is allowed to vary, consistent with constraints from the cosmic microwave background. We also consider more limited combinations of the geometrical (SN, BAO) and dynamical (ISW, redshift-space distortions) probes. © 2009 RAS.
Authors & Co-Authors
Lampeitl, Hubert
United Kingdom, Portsmouth
University of Portsmouth
Nichol, Robert C.
United Kingdom, Portsmouth
University of Portsmouth
Seo, Hee-jong
United States, Batavia
Fermi National Accelerator Laboratory
Giannantonio, Tommaso
United Kingdom, Portsmouth
University of Portsmouth
Germany, Bonn
Universität Bonn
Shapiro, Charles
United Kingdom, Portsmouth
University of Portsmouth
Bassett, Bruce A.C.C.
South Africa, Cape Town
University of Cape Town
South Africa, Cape Town
South African Astronomical Observatory
Percival, Will J.
United Kingdom, Portsmouth
University of Portsmouth
Davis, Tamara M.
Australia, Brisbane
The University of Queensland
Denmark, Copenhagen
Niels Bohr Institutet
Dilday, Benjamin
United States, New Brunswick
Rutgers University–new Brunswick
Frieman, Joshua A.
United States, Batavia
Fermi National Accelerator Laboratory
United States, Chicago
The Kavli Institute for Cosmological Physics
Garnavich, Peter M.
United States, Notre Dame
University of Notre Dame
Sako, Masao
United States, Philadelphia
University of Pennsylvania
Smith, Matthew W.L.
United Kingdom, Portsmouth
University of Portsmouth
South Africa, Cape Town
University of Cape Town
Sollerman, Jesper
Denmark, Copenhagen
Niels Bohr Institutet
Sweden, Stockholm
Stockholms Universitet
Becker, Andrew C.
United States, Seattle
University of Washington
Cinabro, David A.
United States, Detroit
Wayne State University
Filippenko, Alexei V.
United States, Berkeley
University of California, Berkeley
Foley, Ryan J.F.
United States, Berkeley
University of California, Berkeley
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Hogan, Craig J.
United States, Batavia
Fermi National Accelerator Laboratory
Holtzman, Jon A.
United States, Las Cruces
New Mexico State University
Jha, Saurabh W.
United States, New Brunswick
Rutgers University–new Brunswick
Konishi, Kohki
Japan, Tokyo
The University of Tokyo
Marriner, John P.
United States, Batavia
Fermi National Accelerator Laboratory
Richmond, Michael W.
United States, Rochester
Rochester Institute of Technology
Riess, Adam G.
United States, Baltimore
Johns Hopkins University
United States, Baltimore
Space Telescope Science Institute
P. Schneider, Donald P.
United States, University Park
Pennsylvania State University
Stritzinger, Maximilian D.
Denmark, Copenhagen
Niels Bohr Institutet
Chile, La Serena
Las Campanas Observatory
van der Heyden, Kurt J.
South Africa, Cape Town
University of Cape Town
VanderPlas, Jacob T.
United States, Seattle
University of Washington
Wheeler, J. Craig
United States, Austin
The University of Texas at Austin
Zheng, C.
United States, Palo Alto
Stanford University
Statistics
Citations: 103
Authors: 31
Affiliations: 25
Identifiers
Doi:
10.1111/j.1365-2966.2009.15851.x
ISSN:
00358711
e-ISSN:
13652966
Study Design
Cross Sectional Study
Study Approach
Quantitative