PMO OpenIR  > 星系中的恒星形成研究团组
PROBING ASYMMETRIC STRUCTURES IN THE OUTSKIRTS OF GALAXIES
Wen, Zhang Zheng1,2; Zheng, Xian Zhong1; An, Fang Xia1
2014-06-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume787Issue:2Pages:0
AbstractUpcoming large imaging surveys will allow detailed studies of the structure and morphology of galaxies aimed at addressing how galaxies form and evolve. Computational approaches are needed to characterize their morphologies over large samples. We introduce an automatic method to quantify the outer structure of galaxies. The key to our approach is the division of a galaxy image into two sections delineated by the isophote, which encloses half the total brightness of the galaxy. We call the central section the inner half-flux region (IHR) and the outer section the outer half-flux region (OHR). From this division, we derive two parameters: A(o), which measures the asymmetry of the OHR, and D-o, which measures the deviation of the intensity weighted centroid of the OHR from that of the IHR relative to the effective radius. We derive the two parameters from HST/ACS z(850)-band images for a sample of 764 galaxies with z(850) < 22 mag and 0.35 < z < 0.9 selected from the GEMS and GOODS-South surveys. We show that the sample galaxies having strong asymmetric structures, particularly tidal tails, are well-separated from those with regular morphologies in the A(o)-D-o space. Meanwhile, the widely used CAS and Gini-M-20 methods turn out to be insensitive to such morphological features. We stress that the A(o)-D-o method is an efficient way to select galaxies with significant asymmetric features like tidal tails and study galaxy mergers in the dynamical phase traced by these delicate features.
KeywordGalaxies: Fundamental Parameters Galaxies: Interactions Galaxies: Peculiar Galaxies: Structure
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/787/2/130
WOS KeywordMERGER RATE EVOLUTION ; TIDAL DWARF GALAXIES ; MASSIVE GALAXIES ; HIGH-REDSHIFT ; DISTANT GALAXIES ; FIELD GALAXIES ; TIME-SCALES ; MORPHOLOGICAL CLASSIFICATION ; INTERACTING GALAXIES ; LUMINOSITY FUNCTION
URL查看原文
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000336246700035
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10694
Collection星系中的恒星形成研究团组
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Wen, Zhang Zheng,Zheng, Xian Zhong,An, Fang Xia. PROBING ASYMMETRIC STRUCTURES IN THE OUTSKIRTS OF GALAXIES[J]. ASTROPHYSICAL JOURNAL,2014,787(2):0.
APA Wen, Zhang Zheng,Zheng, Xian Zhong,&An, Fang Xia.(2014).PROBING ASYMMETRIC STRUCTURES IN THE OUTSKIRTS OF GALAXIES.ASTROPHYSICAL JOURNAL,787(2),0.
MLA Wen, Zhang Zheng,et al."PROBING ASYMMETRIC STRUCTURES IN THE OUTSKIRTS OF GALAXIES".ASTROPHYSICAL JOURNAL 787.2(2014):0.
Files in This Item:
File Name/Size DocType Version Access License
2014070PROBING ASYMM(2678KB) 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
[Wen, Zhang Zheng]'s Articles
[Zheng, Xian Zhong]'s Articles
[An, Fang Xia]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wen, Zhang Zheng]'s Articles
[Zheng, Xian Zhong]'s Articles
[An, Fang Xia]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wen, Zhang Zheng]'s Articles
[Zheng, Xian Zhong]'s Articles
[An, Fang Xia]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2014070PROBING ASYMMETRIC STRUCTURES IN THE OUTSKIRTS OF GALAXIES.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.