Scale dependence of the primordial spectrum from combining the three-year WMAP, galaxy clustering, supernovae, and Lyman-alpha forests
Feng, B; Xia JQ(夏俊卿); Xia, JQ; Yokoyama, J
刊名JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
2007
期号5页码:20
关键词CMBR experiments inflation physics of the early universe
学科分类Astronomy & Astrophysics; Physics
DOI10.1088/1475-7516/2007/05/020
通讯作者Univ Tokyo, RESCEU, Grad Sch Sci, Tokyo 1130033, Japan ; Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
文章类型Article
英文摘要We probe the scale dependence of the primordial spectrum in the light of the three-year WMAP (WMAP3) alone and WMAP3 in combination with the other cosmological observations such as galaxy clustering and type Ia supernova (SNIa). We pay particular attention to the combination with the Lyman-alpha (Ly alpha) forest. In contrast to the first-year WMAP (WMAP1), WMAP3's preference for the running of the scalar spectral index on large scales is now fairly independent of the low CMB multipoles l. A combination with the galaxy power spectrum from the Sloan Digital Sky Survey (SDSS) prefers a negative running to larger than 2 sigma, regardless of the presence of the low-l CMB ( 2 <= l <= 23) or not. On the other hand, if we focus on the power law Lambda CDM cosmology with only six parameters (matter density Omega(m)h(2), baryon density Omega(b)h(2), Hubble constant H-0, optical depth tau, the spectral index, ns, and the amplitude, A(s), of the scalar perturbation spectrum) when we drop the low-l CMB contributions WMAP3 is consistent with the Harrison-Zel'dovich-Peebles scale-invariant spectrum (n(s) = 1 and no tensor contributions) at similar to 1 sigma. When assuming a simple power-law primordial spectral index or a constant running, in the case when one drops the low-l contributions ( 2 <= l <= 23) WMAP3 is more consistent with the other observations, such as the inferred value of sigma(8).
类目[WOS]Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]Astronomy & Astrophysics ; Physics
原文出处查看原文
语种英语
WOS记录号WOS:000246851300002
引用统计
被引频次:5[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/311005/240365
专题中国科学院高能物理研究所_理论物理室_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714
Feng, B,Xia JQ,Xia, JQ,et al. Scale dependence of the primordial spectrum from combining the three-year WMAP, galaxy clustering, supernovae, and Lyman-alpha forests[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2007(5):20.
APA Feng, B,夏俊卿,Xia, JQ,&Yokoyama, J.(2007).Scale dependence of the primordial spectrum from combining the three-year WMAP, galaxy clustering, supernovae, and Lyman-alpha forests.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(5),20.
MLA Feng, B,et al."Scale dependence of the primordial spectrum from combining the three-year WMAP, galaxy clustering, supernovae, and Lyman-alpha forests".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .5(2007):20.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
8107.pdf(1133KB)期刊论文作者接受稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Feng, B]的文章
[夏俊卿]的文章
[Xia, JQ]的文章
百度学术
百度学术中相似的文章
[Feng, B]的文章
[夏俊卿]的文章
[Xia, JQ]的文章
必应学术
必应学术中相似的文章
[Feng, B]的文章
[夏俊卿]的文章
[Xia, JQ]的文章
相关权益政策
暂无数据
收藏/分享
文件名: 8107.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。