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Guo, Zong-Kuan; Zhu, Zong-Hong; Alcaniz, J. S.; Zhang, Yuan-Zhong; Guo, ZK , Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
Constraints on the Dvali-Gabadadze-Porrati model from recent supernova observations and baryon acoustic oscillations
Source PublicationASTROPHYSICAL JOURNAL
KeywordHolographic Dark Energy High-redshift Supernovae Equation-of-state Probe Wmap Observations Hubble-space-telescope Cosmological Constant Cardassian Expansion Accelerating Universe Ia Supernovae Parameters
AbstractAlthough 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.
2006
ISSN0004-637X
Volume646Issue:1Pages:1-7
Subject AreaPhysics
Indexed BySCI
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Cited Times:56[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5944
CollectionSCI期刊论文
Corresponding AuthorGuo, ZK , Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
Recommended Citation
GB/T 7714
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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