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题名: Probing cosmic acceleration by using the SNLS3 SNIa dataset
作者: Li, XD ;  Li, S ;  Wang, S ;  Zhang, WS ;  Huang, QG ;  Li, M
刊名: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
出版日期: 2011
期号: 7, 页码:11
关键词: AGEGRAPHIC DARK ENERGY ;  BARYON ACOUSTIC-OSCILLATIONS ;  HUBBLE-SPACE-TELESCOPE ;  YANG-MILLS CONDENSATE ;  BVRI LIGHT CURVES ;  COSMOLOGICAL CONSTANT ;  IA SUPERNOVAE ;  DATA RELEASE ;  CONSTRAINTS ;  MODEL
学科分类: Physics
通讯作者: Li, XD (reprint author), Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China.
部门归属: [Li, Xiao-Dong; Wang, Shuang; Zhang, Wen-Shuai] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China; [Li, Xiao-Dong] Univ Sci & Technol China, Interdisciplinary Ctr Theoret Study, Hefei 230026, Peoples R China; [Li, Xiao-Dong; Li, Song; Wang, Shuang; Zhang, Wen-Shuai; Huang, Qing-Guo; Li, Miao] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; [Li, Song; Huang, Qing-Guo; Li, Miao] Chinese Acad Sci, Kavli Inst Theoret Phys, Beijing 100080, Peoples R China; [Huang, Qing-Guo; Li, Miao] Chinese Acad Sci, State Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China
英文摘要: We probe the cosmic acceleration by using the recently released SNLS3 sample of 472 type Ia supernovae. Combining this type Ia supernovae dataset with the cosmic microwave background anisotropy data from the Wilkinson Microwave Anisotropy Probe 7-yr observations, the baryon acoustic oscillation results from the Sloan Digital Sky Survey data release 7, and the Hubble constant measurement from the Wide Field Camera 3 on the Hubble Space Telescope, we measure the dark energy equation of state w and the deceleration parameter q as functions of redshift by using the Chevallier-Polarski-Linder parametrization. Our result is consistent with a cosmological constant at 1 sigma confidence level, without evidence for the recent slowing down of the cosmic acceleration. Furthermore, we consider three binned parametrizations (w is piecewise constant in redshift z) based on different binning methods. The similar results are obtained, the ACDM model is still nicely compatible with current observations.
资助者: NSFC [10535060/A050207, 10975167]; Ministry of Science and Technology [2007CB815401]; Chinese Academy of Science; NSFC group [10821504]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000297541000012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14322
Appears in Collections:理论物理所2011年知识产出_期刊论文

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Recommended Citation:
Li, XD,Li, S,Wang, S,et al. Probing cosmic acceleration by using the SNLS3 SNIa dataset[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2011(7):11.
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