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MERGING GALAXIES WITH TIDAL TAILS IN COSMOS TO z?=?1
Wen (闻璋正),Zhang Zheng1,2; Zheng (郑宪忠),Xian Zhong1
2016-11-18
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume832Issue:1
AbstractABSTRACT Tidal 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 and , 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 technique for strong asymmetric features, along with visual examination. Our results show that the fraction of tidal-tailed mergers evolves mildly with redshift, as , 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 Gyr?1, and corresponds 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
Language英语
WOS IDIOP:0004-637X-832-1-90
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23751
Collection中国科学院紫金山天文台
Affiliation1.Purple Mountain Observatory, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing, 210008, China; zzwen@pmo.ac.cn, xzzheng@pmo.ac.cn
2.University of Chinese Academy of Sciences, 19A Yuquan Road Beijing, China
Recommended Citation
GB/T 7714
Wen ,Zheng . MERGING GALAXIES WITH TIDAL TAILS IN COSMOS TO z?=?1[J]. The Astrophysical Journal,2016,832(1).
APA Wen ,&Zheng .(2016).MERGING GALAXIES WITH TIDAL TAILS IN COSMOS TO z?=?1.The Astrophysical Journal,832(1).
MLA Wen ,et al."MERGING GALAXIES WITH TIDAL TAILS IN COSMOS TO z?=?1".The Astrophysical Journal 832.1(2016).
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