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

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The first cosmological results from the ESSENCE supernova survey (Wood-Vasey et al. 2007) are extended to a wider range of cosmological models including dynamical dark energy and non-standard cosmological models. We fold in a greater number of external data sets such as the recent Higher-z release of high-redshift supernovae (Riess et al. 2007) 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 ... continued below

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9 pages

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Davis, Tamara M.; Mortsell, E.; Sollerman, J.; Becker, A. C.; Blondin, S.; Challis, P. et al. January 25, 2007.

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The first cosmological results from the ESSENCE supernova survey (Wood-Vasey et al. 2007) are extended to a wider range of cosmological models including dynamical dark energy and non-standard cosmological models. We fold in a greater number of external data sets such as the recent Higher-z release of high-redshift supernovae (Riess et al. 2007) 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. Amongst 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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9 pages

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  • Journal Name: Submitted to Astrophys.J.

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  • Report No.: SLAC-PUB-12320
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 898146
  • Archival Resource Key: ark:/67531/metadc888523

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  • January 25, 2007

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  • Sept. 22, 2016, 2:13 a.m.

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  • July 26, 2017, 10:13 a.m.

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Davis, Tamara M.; Mortsell, E.; Sollerman, J.; Becker, A. C.; Blondin, S.; Challis, P. et al. Scrutinizing Exotic Cosmological Models Using ESSENCE Supernova Data Combined With Other Cosmological Probes, article, January 25, 2007; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc888523/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.