ITP OpenIR  > 理论物理所1978-2010年知识产出
Measuring the galaxy power spectrum with multiresolution decomposition. II. Diagonal and off-diagonal power spectra of the Las Campanas Redshift Survey galaxies
Yang, XH; Feng, LL; Chu, YQ; Fang, LZ; Yang, XH , Univ Sci & Technol China, Ctr Astrophys, Hefei 230026, Anhui, Peoples R China.
2001
发表期刊ASTROPHYSICAL JOURNAL
ISSN0004-637X
卷号553期号:1页码:1-13
摘要We study the power spectrum estimator based on the discrete wavelet transform (DWT) for three-dimensional samples. The DWT estimator for higher than one-dimensional samples provides two types of spectra with respect to diagonal and off-diagonal modes, respectively. The two types of modes have different spatial invariance, and therefore the diagonal and off-diagonal DWT power spectra are very flexible for dealing with configuration-related problems in power spectrum detection. With simulation samples and the mock catalogs of the Las Campanas Redshift Survey (LCRS), we show that (1) the slicelike geometry of the LCRS does not affect the off-diagonal power spectrum with a "slicelike" mode; (2) the Poisson sampling with the LCRS selection function does not cause more than 1 sigma error in the DWT power spectrum; and (3) the powers of the mass or galaxy random velocity fluctuations, which cause the redshift distortion, are approximately scale-independent. These results ensure that the uncertainties of the power spectrum measurement are under control. The scatter of the DWT power spectra of the six strips of the LCRS survey is found to be rather small, less than 1 sigma of the cosmic variance of the mock sample in the wavenumber range 0.1< k<2 h Mpc(-1). To fit the detected LCRS diagonal DWT power spectrum with CDM models, we find that the best-fitting redshift distortion parameter beta is about the same as that obtained from the Fourier power spectrum. The velocity dispersions sigma (v) for SCDM and Lambda CDM models are also consistent with other sigma (v) detections with the LCRS. A systematic difference between the best-fitting parameters of diagonal and off-diagonal power spectra have been significantly measured. This indicates that the off-diagonal power spectra are capable of providing information about the power spectrum of the galaxy velocity field.
部门归属Univ Sci & Technol China, Ctr Astrophys, Hefei 230026, Anhui, Peoples R China; Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
关键词Nonlinear Evolution Density Fields Distortions Catalog
学科领域Physics
URL查看原文
收录类别SCI
WOS记录号WOS:000169280400001
引用统计
被引频次:12[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/311006/12745
专题理论物理所1978-2010年知识产出
通讯作者Yang, XH , Univ Sci & Technol China, Ctr Astrophys, Hefei 230026, Anhui, Peoples R China.
推荐引用方式
GB/T 7714
Yang, XH,Feng, LL,Chu, YQ,et al. Measuring the galaxy power spectrum with multiresolution decomposition. II. Diagonal and off-diagonal power spectra of the Las Campanas Redshift Survey galaxies[J]. ASTROPHYSICAL JOURNAL,2001,553(1):1-13.
APA Yang, XH,Feng, LL,Chu, YQ,Fang, LZ,&Yang, XH , Univ Sci & Technol China, Ctr Astrophys, Hefei 230026, Anhui, Peoples R China..(2001).Measuring the galaxy power spectrum with multiresolution decomposition. II. Diagonal and off-diagonal power spectra of the Las Campanas Redshift Survey galaxies.ASTROPHYSICAL JOURNAL,553(1),1-13.
MLA Yang, XH,et al."Measuring the galaxy power spectrum with multiresolution decomposition. II. Diagonal and off-diagonal power spectra of the Las Campanas Redshift Survey galaxies".ASTROPHYSICAL JOURNAL 553.1(2001):1-13.
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
Measuring the Galaxy(265KB) 开放获取使用许可请求全文
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
[Yang, XH]的文章
[Feng, LL]的文章
[Chu, YQ]的文章
百度学术
百度学术中相似的文章
[Yang, XH]的文章
[Feng, LL]的文章
[Chu, YQ]的文章
必应学术
必应学术中相似的文章
[Yang, XH]的文章
[Feng, LL]的文章
[Chu, YQ]的文章
相关权益政策
暂无数据
收藏/分享
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。