Scrutinizing Exotic Cosmological Models Using ESSENCE Supernova Data Combined with Other Cosmological Probes
Scrutinizing Exotic Cosmological Models Using ESSENCE Supernova Data Combined with Other Cosmological Probes
复制标题
DOI：
10.1086/519988
复制
发表时间：
2007-01
期刊：
影响因子：
--
通讯作者：
T. Davis;E. Mörtsell;J. Sollerman;J. Sollerman;A. Becker;S. Blondin;P. Challis;A. Clocchiatti
中科院分区：
文献类型：
--
作者：
T. Davis;E. Mörtsell;J. Sollerman;J. Sollerman;A. Becker;S. Blondin;P. Challis;A. Clocchiatti
ESSENCE超新星巡天（Wood-Vasey和同事）的第一个宇宙学结果被扩展到更广泛的宇宙学模型，包括动态暗能量和非标准宇宙学模型。我们加入了大量的外部数据集，如最近公布的高红移超新星（里斯和同事）的高z数据集，以及几个互补的宇宙学探测器。模型比较统计，如贝叶斯和赤池信息标准，以衡量模型的价值。这些统计数据有利于模型，提供了一个很好的拟合与较少的参数。基于这种分析，首选的宇宙学模型是平坦宇宙学常数模型，其中宇宙的膨胀历史可以用一个描述宇宙能量含量的自由参数来充分描述。在更奇特的模型，提供良好的拟合的数据，我们注意到一个偏好的模型，其最佳拟合参数减少到宇宙常数模型。
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.