Статья

Scrutinizing Exotic Cosmological Models Using ESSENCE Supernova Data Combined with Other Cosmological Probes

T. M. DavisDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, DenmarkEdvard MörtsellDepartment of Astronomy, Stockholm University, AlbaNova, S-10691 Stockholm, SwedenJ. SollermanDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, DenmarkA. BeckerDepartment of Astronomy, University of Washington, Seattle, WA 98195-1580S. BlondinHarvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138Peter ChallisHarvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138A. ClocchiattiPontificia Universidad Católica de Chile, Departamento de Astronomía y Astrofísica, Casilla 306, Santiago 22, ChileA. V. FilippenkoDepartment of Astronomy, University of California, Berkeley, CA 94720-3411R. J. FoleyDepartment of Astronomy, University of California, Berkeley, CA 94720-3411P. GarnavichDepartment of Physics, University of Notre Dame, Notre Dame, IN 46556-5670Saurabh W. JhaKavli Institute for Particle Astrophysics and Cosmology, Stanford Linear Accelerator Center, Menlo Park, CA 94025K. KrisciunasDepartment of Physics, Texas A&M University, College Station, TX 77843-4242R. KirshnerHarvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138B. LeibundgutEuropean Southern Observatory, D-85748 Garching, GermanyW LiDepartment of Astronomy, University of California, Berkeley, CA 94720-3411T. MathesonNational Optical Astronomy Observatory, Tucson, AZ 85719-4933G. MiknaitisFermilab, Batavia, IL 60510-0500G. PignataPontificia Universidad Católica de Chile, Departamento de Astronomía y Astrofísica, Casilla 306, Santiago 22, ChileA. RestCerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, Casilla 603, La Serena, ChileAdam G. RiessJohns Hopkins University, Baltimore, MD 21218B. SchmidtResearch School of Astronomy and Astrophysics, Australian National University, Mount Stromlo and Siding Spring Observatories, Weston Creek PO 2611, AustraliaR. C. SmithCerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, Casilla 603, La Serena, ChileJ. SpyromilioEuropean Southern Observatory, D-85748 Garching, GermanyC. W. StubbsDepartment of Physics, Harvard University, Cambridge, MA 02138N. B. SuntzeffCerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, Casilla 603, La Serena, ChileJ. TonryInstitute for Astronomy, University of Hawaii, Honolulu, HI 96822W. M. Wood‐VaseyHarvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138A. ZentenoDepartment of Astronomy, University of Illinois at Urbana-Champaign, Urbana, IL 61801-3080

2007en

ABI

Аннотация

The first cosmological results from the ESSENCE supernova survey (Wood-Vasey and coworkers) are extended to a wider range of cosmological models including dynamical dark energy and nonstandard cosmological models. We fold in a greater number of external data sets such as the recent Higher-z release of high-redshift supernovae (Riess and coworkers), as well as several complementary cosmological probes. Model comparison statistics such as the Bayesian and Akaike information criteria are applied to gauge the worth of models. These statistics favor models that give a good fit with fewer parameters. Based on this analysis, the preferred cosmological model is the flat cosmological constant model, where the expansion history of the universe can be adequately described with only one free parameter describing the energy content of the universe. Among the more exotic models that provide good fits to the data, we note a preference for models whose best-fit parameters reduce them to the cosmological constant model.

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Идентификаторы

DOI: 10.1086/519988

Цитирования и источники

Цитирований: 2Использованных источников: 0

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