| Observation Constraints on the Simplified GCG Model |
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| 引用本文： | 董素梅 吴普训. Observation Constraints on the Simplified GCG Model[J]. 中国物理快报, 2007, 24(6): 1782-1785 |
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| 作者姓名： | 董素梅 吴普训 |
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| 作者单位： | School of Sciences and Institute of Math-Physics, Central South University of Forestry and Technology, Changsha 410004 |
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| 基金项目： | Supported by the Doctoral Foundation of CSUFT under Grants No 06Y020. |
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| 摘 要： | A simplified version of generalized Chaplygin gas （GCG） as a dark energy model is studied. By using the latest 162 ESSENCE type Ia supernovae （She Ia） data, 30 high redshift She Ia data, the baryonic acoustic oscillation peak from SDSS and the CMB data from WMAP3, a strong constraint on this simplified GCG model is obtained. At the 95.4% confidence level we obtain 0.21 ≤ Ωm ≤ 0.31 and 0.994 〈 α 〈 1.0 with the best fit Ωm = 0.25 and a = 1. This best fit scenario corresponds to an accelerating universe with qo ≈-0.65 and z ≈ 0.81 （a redshiR of cosmic phase transition from deceleration to acceleration）.
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| 关 键 词： | 黑物质 气体 原子能 混合气体 |
| 收稿时间： | 2007-02-07 |
| 修稿时间： | 2007-02-07 |
Observation Constraints on the Simplified GCG Model |
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| DONG Su-Mei,WU Pu-Xun. Observation Constraints on the Simplified GCG Model[J]. Chinese Physics Letters, 2007, 24(6): 1782-1785 |
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| Authors: | DONG Su-Mei WU Pu-Xun |
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| Affiliation: | School of Sciences and Institute of Math-Physics, Central South University of Forestry and Technology, Changsha 410004 |
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| Abstract: | |
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| Keywords: | 98.80.-k 98.80.Es |
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