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Constraints on models with a break in the primordial power spectrum
Li H(李虹); Li, H; Xia, JQ; Brandenberger, R; Zhang, XM; Zhang XM(张新民)
2010
发表期刊PHYSICS LETTERS B
卷号690期号:5页码:451-455
通讯作者[Li, Hong ; Brandenberger, Robert ; Zhang, Xinmin] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Li, Hong ; Brandenberger, Robert ; Zhang, Xinmin] Chinese Acad Sci, TPCSF, Beijing 100864, Peoples R China ; [Li, Hong ; Brandenberger, Robert] Chinese Acad Sci, Kavli Inst Theoret Phys, Beijing 100190, Peoples R China ; [Xia, Jun-Qing] Scuola Int Super Studi Avanzati, I-34136 Trieste, Italy ; [Brandenberger, Robert] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada
文章类型Article
摘要One of the characteristics of the "Matter Bounce" scenario, an alternative to cosmological inflation for producing a scale-invariant spectrum of primordial adiabatic fluctuations on large scales, is a break in the power spectrum at a characteristic scale, below which the spectral index changes from n(s) = 1 to n(s) = 3. We study the constraints which current cosmological data place on the location of such a break, and more generally on the position of the break and the slope at length scales smaller than the break. The observational data we use include the WMAP five-year data set (WMAP5), other CMB data from BOOMERanG, CBI, VSA, and ACBAR, large-scale structure data from the Sloan Digital Sky Survey (SDSS, their luminous red galaxies sample), Type la Supernovae data (the "Union" compilation), and the Sloan Digital Sky Survey Lyman-alpha forest power spectrum (Ly alpha) data. We employ the Markov Chain Monte Carlo method to constrain the features in the primordial power spectrum which are motivated by the matter bounce model. We give an upper limit on the length scale where the break in the spectrum occurs. (C) 2010 Elsevier B.V. All rights reserved.
关键词Bounce cosmology Astronomical observational data
学科领域Physics
研究领域[WOS]Physics ; Physics
DOI10.1016/j.physletb.2010.05.075
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语种英语
研究领域[WOS]Physics ; Physics
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000279989100002
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被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/237538
专题理论物理室
粒子天体物理中心
多学科研究中心
作者单位中国科学院高能物理研究所
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Li H,Li, H,Xia, JQ,et al. Constraints on models with a break in the primordial power spectrum[J]. PHYSICS LETTERS B,2010,690(5):451-455.
APA 李虹,Li, H,Xia, JQ,Brandenberger, R,Zhang, XM,&张新民.(2010).Constraints on models with a break in the primordial power spectrum.PHYSICS LETTERS B,690(5),451-455.
MLA 李虹,et al."Constraints on models with a break in the primordial power spectrum".PHYSICS LETTERS B 690.5(2010):451-455.
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