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Observational Constraints on the Nature of Dark Energy: First Cosmological Results from the ESSENCE Supernova Survey
Open accessAbstract
We present constraints on the dark energy equation-of-state parameter, w = P /(ρ c 2 ), using 60 SNe Ia from the ESSENCE supernova survey. We derive a set of constraints on the nature of the dark energy assuming a flat universe. By including constraints on (Ω M , w ) from baryon acoustic oscillations, we obtain a value for a static equation-of-state parameter w = -1.05 (stat 1 σ) ± 0.13 (sys) and Ω M = 0.274 (stat 1 σ) with a best-fit χ 2 /dof of 0.96. These results are consistent with those reported by the Supernova Legacy Survey from the first year of a similar program measuring supernova distances and redshifts. We evaluate sources of systematic error that afflict supernova observations and present Monte Carlo simulations that explore these effects. Currently, the largest systematic with the potential to affect our measurements is the treatment of extinction due to dust in the supernova host galaxies. Combining our set of ESSENCE SNe Ia with the first-results Supernova Legacy Survey SNe Ia, we obtain a joint constraint of w = -1.07 (stat 1 σ) ± 0.13 (sys), Ω M = 0.267 (stat 1 σ) with a best-fit χ 2 /dof of 0.91. The current global SN Ia data alone rule out empty (Ω M = 0), matter-only Ω M = 0.3, and Ω M = 1 universes at >4.5 σ. The current SN Ia data are fully consistent with a cosmological constant.
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“Carrying out these K -corrections requires that the calibration of the relative offsets in photometric zero-points between fi lters and the system response functions, especially near the edges of bandpasses, be accurate to about 1% ( Wood-Vasey et al. 2007 )”
From LSST: From Science Drivers to Reference Design and Anticipated Data Products (2019) · cites this paper as Wood-Vasey et al. 2007
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Metadata
- Authors
- Wood‐Vasey, W. M., Miknaitis, G., Stubbs, C. W., Jha, S., Riess, A. G., Garnavich, P. M., Kirshner, R. P., Aguilera, C., Becker, A. C., Blackman, J. W., Blondin, S., Challis, P., Clocchiatti, A., Conley, A., Covarrubias, R., Davis, T. M., Filippenko, A. V., Foley, R. J., Garg, A., Hicken, M., Krisciunas, K., Leibundgut, B., Li, W., Matheson, T., Miceli, A., Narayan, G., Pignata, G., Prieto, J. L., Rest, A., Salvo, M. E., Schmidt, B. P., Smith, R. C., Sollerman, J., Spyromilio, J., Tonry, J. L., Suntzeff, N. B., & Zenteno, A.
- Affiliations
- Center for Astrophysics Harvard & Smithsonian (US)
- Fermi National Accelerator Laboratory (US)
- Harvard University (US)
- SLAC National Accelerator Laboratory (US)
- Space Telescope Science Institute (US)
- University of Notre Dame (US)
- Cerro Tololo Inter-American Observatory (CL)
- University of Washington (US)
- Australian National University (AU)
- Pontificia Universidad Católica de Chile (CL)
- University of Toronto (CA)
- University of Copenhagen (DK)
- University of California, Berkeley (US)
- European Southern Observatory (DE)
- The Ohio State University (US)
- University of Hawaiʻi at Mānoa (US)
- ORCID
- Wood‐Vasey, W. M.
- Stubbs, C. W.
- Jha, S.
- Riess, A. G.
- Garnavich, P. M.
- Kirshner, R. P.
- Becker, A. C.
- Blackman, J. W.
- Blondin, S.
- Clocchiatti, A.
- Davis, T. M.
- Filippenko, A. V.
- Foley, R. J.
- Krisciunas, K.
- Leibundgut, B.
- Li, W.
- Matheson, T.
- Narayan, G.
- Pignata, G.
- Prieto, J. L.
- Rest, A.
- Schmidt, B. P.
- Smith, R. C.
- Sollerman, J.
- Spyromilio, J.
- Tonry, J. L.
- Suntzeff, N. B.
- Zenteno, A.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2007-09-10
- Volume
- 666
- Issue
- 2
- Pages
- 694-715
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2057351095
- Cited by
- 928
- References
- 145
- Citations by year
- 2026: 13 · 2025: 20 · 2024: 20 · 2023: 9 · 2022: 19 · 2021: 23 · 2020: 18 · 2019: 25 · 2018: 21 · 2017: 20 · 2016: 29 · 2015: 22 · 2014: 39 · 2013: 43 · 2012: 84
- FWCI
- 86.78
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- The Astrophysical Journal (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- University of North Texas Digital Library (University of North Texas) (submittedVersion)
- HAL (submittedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- OakTrust (Texas A&M University Libraries) (submittedVersion)
- ANU Open Research (Australian National University) (submittedVersion)
- OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
- Research at the University of Copenhagen (University of Copenhagen) (submittedVersion)
- arXiv (Cornell University)
- Funders
- National Science Foundation (0443378, 0606772)
- Smithsonian Institution
- National Aeronautics and Space Administration (NAG59364)
- W. M. Keck Foundation
- California Institute of Technology
- Harvard University
- Aspen Center for Physics
- University of Arizona
- National Research Foundation
- Danmarks Grundforskningsfond
- Consejo Nacional de Investigaciones Científicas y Técnicas
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- European Southern Observatory
- Smithsonian Astrophysical Observatory
- National Research Council Canada
- Australian Research Council
- Comisión Nacional de Investigación Científica y Tecnológica
- Fondo de Financiamiento de Centros de Investigación en Áreas Prioritarias
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Gamma-ray bursts and supernovae
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Dark Matter and Cosmic Phenomena
- Keywords
- dark energy, equation of state parameter, Type Ia supernovae, Supernova Legacy Survey, baryon acoustic oscillations, matter density parameter, flat universe, systematic errors, interstellar extinction, cosmological constant, dark energy constraints
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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