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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
The Hubble Space Telescope Cluster Supernova Survey. V. Improving the dark-energy constraints above z > 1 and building an early-type-hosted supernova sample
Astrophysical Journal, Volume 746, No. 1, Article 85, Year 2012
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Description
We present Advanced Camera for Surveys, NICMOS, and Keck adaptive-optics-assisted photometry of 20TypeIa supernovae (SNeIa) from the Hubble Space Telescope (HST) Cluster Supernova Survey. The SNeIa were discovered over the redshift interval 0.623 < z < 1.415. Of these SNeIa, 14 pass our strict selection cuts and are used in combination with the world's sample of SNeIa to derive the best current constraints on dark energy. Of our new SNeIa, 10 are beyond redshift z = 1, thereby nearly doubling the statistical weight of HST-discovered SNeIa beyond this redshift. Our detailed analysis corrects for the recently identified correlation between SNIa luminosity and host galaxy mass and corrects the NICMOS zero point at the count rates appropriate for very distant SNeIa. Adding these SNe improves the best combined constraint on dark-energy density, ρDE(z), at redshifts 1.0 < z < 1.6 by 18% (including systematic errors). For a flat ΛCDM universe, we find ΩΛ = 0.729±0.014 (68% confidence level (CL) including systematic errors). For a flat wCDM model, we measure a constant dark-energy equation-of-state parameter w = -1.013-0.073 +0.068 (68% CL). Curvature is constrained to ∼0.7% in the owCDM model and to ∼2% in a model in which dark energy is allowed to vary with parameters w 0 and wa . Further tightening the constraints on the time evolution of dark energy will require several improvements, including high-quality multi-passband photometry of a sample of several dozen z > 1 SNeIa. We describe how such a sample could be efficiently obtained by targeting cluster fields with WFC3 on board HST. The updated supernova Union2.1 compilation of 580 SNe is available at http://supernova.lbl.gov/Union. © 2012. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Lidman, Christopher E.
Australia
Australian Astronomical Observatory
Amanullah, Rahman
United States, Berkeley
University of California, Berkeley
Sweden, Stockholm
Oskar Klein Centre
Barbary, Kyle
United States, Berkeley
Lawrence Berkeley National Laboratory
United States, Berkeley
University of California, Berkeley
Barrientos, F. Felipe
Chile, Santiago
Pontificia Universidad Católica de Chile
Brodwin, Mark
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Dawson, Kyle S.
United States, Salt Lake City
The University of Utah
Dey, Arjun T.
United States, Tucson
National Optical Astronomy Observatory
Doi, Mamoru
Japan, Tokyo
The University of Tokyo
Donahue, Megan E.
United States, East Lansing
Michigan State University
Deustua, Susana E.
United States, Baltimore
Space Telescope Science Institute
Eisenhardt, Peter R.M.
United States, Pasadena
California Institute of Technology
Ellingson, Erica E.
United States, Boulder
University of Colorado Boulder
Faccioli, Lorenzo
United States, Berkeley
Lawrence Berkeley National Laboratory
United States, Berkeley
University of California, Berkeley
Fadeyev, Vitaliy
United States, Santa Cruz
University of California, Santa Cruz
Fruchter, Andrew S.
United States, Baltimore
Space Telescope Science Institute
Gilbank, David G.
Canada, Waterloo
University of Waterloo
Gladders, Michael D.
United States, Chicago
The University of Chicago
González, Anthony H.
United States, Gainesville
University of Florida
Goobar, Ariel M.
Sweden, Stockholm
Oskar Klein Centre
Sweden, Stockholm
Albanova Universitetscentrum
Hattori, Takashi G.
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Hoekstra, Henk
Netherlands, Leiden
Universiteit Leiden
Hsiao, Eric Y.
United States, Berkeley
Lawrence Berkeley National Laboratory
United States, Berkeley
University of California, Berkeley
Ihara, Yutaka
Japan, Tokyo
The University of Tokyo
Jee, Myungkook James E.
United States, Davis
University of California, Davis
Johnston, David E.
United States, East Lansing
Michigan State University
United States, Evanston
Northwestern University
Kashikawa, Nobunari
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Konishi, Kohki
Japan, Tokyo
The University of Tokyo
Kowalski, Marek P.
Germany, Bonn
Universität Bonn
Linder, Eric V.
United States, Berkeley
Lawrence Berkeley National Laboratory
United States, Berkeley
University of California, Berkeley
Lubin, Lori M.
United States, Davis
University of California, Davis
Meyers, Joshua E.
United States, Berkeley
Lawrence Berkeley National Laboratory
United States, Berkeley
University of California, Berkeley
Morokuma, Tomoki
Japan, Tokyo
The University of Tokyo
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Munshi, Ferah A.
United States, Berkeley
University of California, Berkeley
United States, Seattle
University of Washington
Mullis, Christopher R.
Unknown Affiliation
Panagia, Nino
United States, Baltimore
Space Telescope Science Institute
Perlmutter, Saul
United States, Berkeley
Lawrence Berkeley National Laboratory
United States, Berkeley
University of California, Berkeley
Postman, Marc P.
United States, Baltimore
Space Telescope Science Institute
Pritchard, Tyler A.
United States, Berkeley
University of California, Berkeley
United States, University Park
Pennsylvania State University
Rhodes, Jason D.
United States, Pasadena
California Institute of Technology
United States, Pasadena
Carnegie Observatories
Rosati, P.
Germany, Garching Bei Munchen
European Southern Observatory
Schlegel, David J.
United States, Berkeley
Lawrence Berkeley National Laboratory
Stanford, Spencer Adam
United States, Davis
University of California, Davis
United States, Livermore
Institute of Geophysics and Planetary Physics at Lawrence Livermore National Laboratory
Stanishev, Vallery
Sweden, Stockholm
Albanova Universitetscentrum
Portugal, Lisbon
Instituto Superior Técnico
Stern, Daniel K.
United States, Pasadena
California Institute of Technology
Takanashi, Naohiro
Japan, Mitaka
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Tokita, Kouichi
Japan, Tokyo
The University of Tokyo
Wagner, Ryan Mark
United States, Berkeley
University of California, Berkeley
Yasuda, Naoki
Japan, Tokyo
The University of Tokyo
Yee, Howard K.C.
Canada, Toronto
University of Toronto
Statistics
Citations: 1,371
Authors: 49
Affiliations: 34
Identifiers
Doi:
10.1088/0004-637X/746/1/85
ISSN:
0004637X
Study Design
Cross Sectional Study
Study Approach
Quantitative