A Study of the Merging Dwarf Galaxy VCC322

doi:10.3847/1538-4357/ad2f2d

	A Study of the Merging Dwarf Galaxy VCC322
	Zhang LY(张兰月)1,4; Zhao YH(赵应和)1,3; Zhang, Hong-Xin 2
刊名	ASTROPHYSICAL JOURNAL
	2024-04-01
卷号	965 期号:1
ISSN号	0004-637X
DOI	10.3847/1538-4357/ad2f2d
产权排序	第1完成单位
文献子类	Article
英文摘要	Galaxy interactions and mergers can enhance or reduce star formation, but a complete understanding of the involved processes is still lacking. The effect of dwarf galaxy mergers is even less clear than their massive counterpart. We present a study on a dwarf merger remnant in the Virgo cluster, VCC322, which might form a triple system with VCC334 and VCC319. We identify a prominent long and straight tail-like substructure that has a size comparable to its host galaxy VCC322. By comparing the color-color (g - r versus r - H) distribution with simple stellar population models, we infer that the metallicity and stellar age of this tail are Z ⋆ similar to 0.02 Z circle dot and t ⋆ similar to 10 Gyr, respectively. In VCC319, we find a sign of isophotal twisting. This suggests that VCC319 may be subject to tidal interaction. An analysis of the Sloan Digital Sky Survey optical spectra of VCC322 indicates mass- and light-weighted ages of about 109.8 yr and 107.5 yr, respectively, indicating an ongoing star formation activity. However, the star formation in VCC322 seems suppressed when compared to other star-forming dwarfs of comparable stellar masses. Our finding of shock excitation of optical emission lines indicates that interaction-induced shock may contribute to the heating of cold gas and suppression of star formation.
学科主题	天文学
URL标识	查看原文
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
资助项目	China Manned Space Project[CMS-CSST-2021-A06]; China Manned Space Project[CMS-CSST-2021-B02]; NSFC[11421303]; NSFC[11973039]; NSFC[12122303]; NSFC[12173079]; CAS Pioneer Hundred Talents Program; Strategic Priority Research Program of Chinese Academy of Sciences[XDB 41000000]; Cyrus Chung Ying Tang Foundations; CNPq; CAPES; FAPESP; France Brazil CAPES/Cofecub program; National Aeronautics and Space Administration; Alfred P. Sloan Foundation; National Science Foundation; U.S. Department of Energy Office of Science; Director, Office of Science, Office of High Energy Physics of the U.S. Department of Energy[DE-AC02-05CH1123]; National Energy Research Scientific Computing Center, a DOE Office of Science User Facility; U.S. National Science Foundation, Division of Astronomical Sciences[AST-0950945]
WOS关键词	STAR-FORMING GALAXIES ; VIRGO CLUSTER SURVEY ; DIGITAL SKY SURVEY ; FAST ALPHA SURVEY ; MOLECULAR GAS ; STELLAR MASS ; SEMIEMPIRICAL ANALYSIS ; STARBURST GALAXIES ; ELLIPTIC GALAXIES ; HOST GALAXIES
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:001194849800001
资助机构	China Manned Space Project[CMS-CSST-2021-A06, CMS-CSST-2021-B02] ; NSFC[11421303, 11973039, 12122303, 12173079] ; CAS Pioneer Hundred Talents Program ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB 41000000] ; Cyrus Chung Ying Tang Foundations ; CNPq ; CAPES ; FAPESP ; France Brazil CAPES/Cofecub program ; National Aeronautics and Space Administration ; Alfred P. Sloan Foundation ; National Science Foundation ; U.S. Department of Energy Office of Science ; Director, Office of Science, Office of High Energy Physics of the U.S. Department of Energy[DE-AC02-05CH1123] ; National Energy Research Scientific Computing Center, a DOE Office of Science User Facility ; U.S. National Science Foundation, Division of Astronomical Sciences[AST-0950945]
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/26750]
专题	星系类星体研究组
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China; 2.CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China; hzhang18@ustc.edu.cn 3.Key Laboratory of Radio Astronomy and Technology (Chinese Academy of Sciences, A20 Datun Road), Chaoyang District, Beijing, 100101, People's Republic of China; 4.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China;
推荐引用方式 GB/T 7714	Zhang LY,Zhao YH,Zhang, Hong-Xin. A Study of the Merging Dwarf Galaxy VCC322[J]. ASTROPHYSICAL JOURNAL,2024,965(1).
APA	张兰月,赵应和,&Zhang, Hong-Xin.(2024).A Study of the Merging Dwarf Galaxy VCC322.ASTROPHYSICAL JOURNAL,965(1).
MLA	张兰月,et al."A Study of the Merging Dwarf Galaxy VCC322".ASTROPHYSICAL JOURNAL 965.1(2024).