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题名: Constraints on the Dvali-Gabadadze-Porrati model from recent supernova observations and baryon acoustic oscillations
作者: 郭宗宽 ;  Zhu, Zong-Hong ;  Alcaniz, J. S. ;  Zhang, Yuan-Zhong
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2006
卷号: 646, 期号:1, 页码:1-7
关键词: HOLOGRAPHIC DARK ENERGY ;  HIGH-REDSHIFT SUPERNOVAE ;  EQUATION-OF-STATE ;  PROBE WMAP OBSERVATIONS ;  HUBBLE-SPACE-TELESCOPE ;  COSMOLOGICAL CONSTANT ;  CARDASSIAN EXPANSION ;  ACCELERATING UNIVERSE ;  IA SUPERNOVAE ;  PARAMETERS
学科分类: Physics
通讯作者: Guo, ZK , Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
部门归属: Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China; Observ Nacl, Dept Astron, BR-20921400 Rio De Janeiro, Brazil; CCAST World Lab, Beijing 100080, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: Although there is mounting observational evidence that the expansion of our universe is undergoing a late-time acceleration, the mechanism for this acceleration is yet unknown. In the so-called Dvali-Gabadadze-Porrati (DGP) model this phenomenon is attributed to gravitational "leakage'' into extra dimensions. In this work, we mainly focus our attention on the constraints on the model from the "gold sample'' of Type Ia supernovae (SNe Ia), the first-year data from the Supernova Legacy Survey (SNLS), and the baryon acoustic oscillation (BAO) peak found in the Sloan Digital Sky Survey (SDSS). At 99.73% confidence level, the combination of the three databases provides Omega(m) = 0.270(-0.017)(+0. 018) and Omega(rc) = 0.216(-0.013)(+0.012) (hence, a spatially closed universe with Omega(k) = -0.350(-0.083)(+0.080)), which seems to be in contradiction with the most recent WMAP results indicating a flat universe. Based on this result, we also estimated the transition redshift (at which the universe switches from deceleration to acceleration) to be 0.70 < z(q=0) < 1.01, at 2 sigma confidence level.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000239644900001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5944
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Guo, Zong-Kuan,Zhu, Zong-Hong,Alcaniz, J. S.,et al. Constraints on the Dvali-Gabadadze-Porrati model from recent supernova observations and baryon acoustic oscillations[J]. ASTROPHYSICAL JOURNAL,2006,646(1):1-7.
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