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题名: Constraints on models with a break in the primordial power spectrum
作者: Li, Hong ;  Xia, Jun-Qing ;  Brandenberger, Robert ;  Zhang, Xinmin
刊名: PHYSICS LETTERS B
出版日期: 2010
卷号: 690, 期号:5, 页码:451-455
关键词: INFLATIONARY UNIVERSE ;  ALPHA FOREST ;  BLACK-HOLES ;  SINGULARITY ;  FLATNESS ;  HORIZON
学科分类: Physics
通讯作者: Li, H , Chinese Acad Sci, Inst High Energy Phys, POB 918-4, Beijing 100049, Peoples R China
部门归属: [Li, H; Brandenberger, R; Zhang, XM] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China; [Li, H; Brandenberger, R; Zhang, XM] Chinese Acad Sci, TPCSF, Beijing 100864, Peoples R China; [Li, H; Brandenberger, R] Chinese Acad Sci, Kavli Inst Theoret Phys, Beijing 100190, Peoples R China; [Xia, JQ] Scuola Int Super Studi Avanzati, I-34136 Trieste, Italy; [Brandenberger, R] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada
英文摘要: 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.
资助者: NASA Office of Space Science; National Natural Science Foundation of China[10803001, 90303004, 10533010, 10675136]; Chinese Academy of Science[KJCX3-SYW-N2]; Institute of High Energy Physics; KITPC; NSERC; CRC
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000279989100002
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5081
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:
Li, Hong,Xia, Jun-Qing,Brandenberger, Robert,et al. Constraints on models with a break in the primordial power spectrum[J]. PHYSICS LETTERS B,2010,690(5):451-455.
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