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MERGING GALAXIES WITH TIDAL TAILS IN COSMOS TO z=1
Wen, Zhang Zheng1,2; Zheng, Xian Zhong1
2016-11-20
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume832Issue:1Pages:14
Corresponding AuthorWen, Zhang Zheng(zzwen@pmo.ac.cn)
AbstractTidal tails are created in major mergers involving disk galaxies. It remains to be explored how the tidal tails trace the assembly history of massive galaxies. We identify a sample of 461 merging galaxies with long tidal tails, from 35,076 galaxies mass-complete at M-star >= 10(9.5) M-circle dot and 0.2 <= z <= 1, based on Hubble Space Telescope/ACS F814W imaging data and public catalogs of the COSMOS field. The long tails refer to those with length equal to or greater than the diameter of their host galaxies. The mergers with tidal tails are selected using our novel A(O) - D-O technique for strong asymmetric features, along with visual examination. Our results show that the fraction of tidaltailed mergers evolves mildly with redshift, as similar to(1 + z)(2.0 +/- 0.4), and becomes relatively higher in less-massive galaxies, out to z = 1. With a timescale of 0.5 Gyr for the tidal-tailed mergers, we obtain that the occurrence rate of such mergers follows 0.01 +/- 0.007 (1+ z)(2.3 + 1.4) Gyr(-1), and corresponds to similar to 0.3 events since z = 1, as well as roughly one-third of the total budget of major mergers from the literature. For disk-involved major mergers, nearly half of them have undergone a phase with long tidal tails.
Keywordgalaxies: active galaxies: evolution galaxies: interactions galaxies: structure techniques: image processing
DOI10.3847/0004-637X/832/1/90
WOS KeywordSTAR-FORMATION HISTORY ; SIMILAR-TO 1 ; ULTRA-DEEP-FIELD ; SUPERMASSIVE BLACK-HOLES ; MASS ASSEMBLY HISTORIES ; ACTIVE GALACTIC NUCLEI ; MERGER RATE EVOLUTION ; EXTENDED GROTH STRIP ; GOODS NICMOS SURVEY ; DARK-MATTER HALOES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000388743800020
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23445
Collection中国科学院紫金山天文台
Corresponding AuthorWen, Zhang Zheng
Affiliation1.Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Wen, Zhang Zheng,Zheng, Xian Zhong. MERGING GALAXIES WITH TIDAL TAILS IN COSMOS TO z=1[J]. ASTROPHYSICAL JOURNAL,2016,832(1):14.
APA Wen, Zhang Zheng,&Zheng, Xian Zhong.(2016).MERGING GALAXIES WITH TIDAL TAILS IN COSMOS TO z=1.ASTROPHYSICAL JOURNAL,832(1),14.
MLA Wen, Zhang Zheng,et al."MERGING GALAXIES WITH TIDAL TAILS IN COSMOS TO z=1".ASTROPHYSICAL JOURNAL 832.1(2016):14.
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