PMO OpenIR  > 期刊(老文献)
THE APPLICATION OF CONTINUOUS WAVELET TRANSFORM BASED FOREGROUND SUBTRACTION METHOD IN 21 cm SKY SURVEYS
Gu, Junhua1; Xu, Haiguang2; Wang, Jingying2; An, Tao3,4; Chen, Wen2; Gu,JH
2013-08-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume773Issue:1
AbstractWe propose a continuous wavelet transform based non-parametric foreground subtraction method for the detection of redshifted 21 cm signal from the epoch of reionization. This method works based on the assumption that the foreground spectra are smooth in frequency domain, while the 21 cm signal spectrum is full of saw-tooth-like structures, thus their characteristic scales are significantly different. We can distinguish them in the wavelet coefficient space easily and perform the foreground subtraction. Compared with the traditional spectral fitting based method, our method is more tolerant to complex foregrounds. Furthermore, we also find that when the instrument has uncorrected response error, our method can also work significantly better than the spectral fitting based method. Our method can obtain similar results with the Wp smoothing method, which is also a non-parametric method, but our method consumes much less computing time.
KeywordCosmology: Theory Dark Ages, Reionization, First Stars Methods: Data Analysis Radio Lines: General
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/773/1/38
WOS KeywordREIONIZATION EPOCH ; SPECTRAL TURNOVER ; POWER SPECTRUM ; RADIO-SOURCES ; 21-CM EPOCH ; SIMULATIONS ; CONSTRAINTS ; TEMPERATURE ; TOMOGRAPHY ; SIGNAL
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000322531900038
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10107
Collection期刊(老文献)
Corresponding AuthorGu,JH
Affiliation1.Natl Astron Observ CAS, Beijing, Peoples R China
2.Shanghai Jiao Tong Univ, Shanghai 200030, Peoples R China
3.Shanghai Astron Observ CAS, Shanghai 200030, Peoples R China
4.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Gu, Junhua,Xu, Haiguang,Wang, Jingying,et al. THE APPLICATION OF CONTINUOUS WAVELET TRANSFORM BASED FOREGROUND SUBTRACTION METHOD IN 21 cm SKY SURVEYS[J]. ASTROPHYSICAL JOURNAL,2013,773(1).
APA Gu, Junhua,Xu, Haiguang,Wang, Jingying,An, Tao,Chen, Wen,&Gu,JH.(2013).THE APPLICATION OF CONTINUOUS WAVELET TRANSFORM BASED FOREGROUND SUBTRACTION METHOD IN 21 cm SKY SURVEYS.ASTROPHYSICAL JOURNAL,773(1).
MLA Gu, Junhua,et al."THE APPLICATION OF CONTINUOUS WAVELET TRANSFORM BASED FOREGROUND SUBTRACTION METHOD IN 21 cm SKY SURVEYS".ASTROPHYSICAL JOURNAL 773.1(2013).
Files in This Item:
File Name/Size DocType Version Access License
2013007THE APPLICATI(851KB) 开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Gu, Junhua]'s Articles
[Xu, Haiguang]'s Articles
[Wang, Jingying]'s Articles
Baidu academic
Similar articles in Baidu academic
[Gu, Junhua]'s Articles
[Xu, Haiguang]'s Articles
[Wang, Jingying]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Gu, Junhua]'s Articles
[Xu, Haiguang]'s Articles
[Wang, Jingying]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2013007THE APPLICATION OF CONTINUOUS WAVELET TRANSFORM BASED FOREGROUND SUBTRACTION METHOD IN 21 cm SKY SURVEYS.pdf
Format: Adobe PDF
This file does not support browsing at this time
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.