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Constraints on the Dvali-Gabadadze-Porrati model from recent supernova observations and baryon acoustic oscillations
Guo, Zong-Kuan; Zhu, Zong-Hong; Alcaniz, J. S.; Zhang, Yuan-Zhong; Guo, ZK , Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
2006
发表期刊ASTROPHYSICAL JOURNAL
ISSN0004-637X
卷号646期号:1页码:1-7
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.
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
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
学科领域Physics
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收录类别SCI
WOS记录号WOS:000239644900001
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被引频次:56[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5944
专题理论物理所1978-2010年知识产出
通讯作者Guo, ZK , Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
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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.
APA Guo, Zong-Kuan,Zhu, Zong-Hong,Alcaniz, J. S.,Zhang, Yuan-Zhong,&Guo, ZK , Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China.(2006).Constraints on the Dvali-Gabadadze-Porrati model from recent supernova observations and baryon acoustic oscillations.ASTROPHYSICAL JOURNAL,646(1),1-7.
MLA Guo, Zong-Kuan,et al."Constraints on the Dvali-Gabadadze-Porrati model from recent supernova observations and baryon acoustic oscillations".ASTROPHYSICAL JOURNAL 646.1(2006):1-7.
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