A Study of the Merging Dwarf Galaxy VCC322

doi:10.3847/1538-4357/ad2f2d

YNAO OpenIR > 星系类星体研究组

	A Study of the Merging Dwarf Galaxy VCC322
	Zhang LY(张兰月)1,2 ; Zhao YH(赵应和)1,3 ; Zhang, Hong-Xin 4
发表期刊	ASTROPHYSICAL JOURNAL
	2024-04-01
卷号	965 期号:1
DOI	10.3847/1538-4357/ad2f2d
产权排序	第1完成单位
收录类别	SCI
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.
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]
项目资助者	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]
语种	英语
学科领域	天文学
文章类型	Article
出版者	IOP Publishing Ltd
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN	0004-637X
URL	查看原文
WOS记录号	WOS:001194849800001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	STAR-FORMING GALAXIES ; VIRGO CLUSTER SURVEY ; DIGITAL SKY SURVEY ; FAST ALPHA SURVEY ; MOLECULAR GAS ; STELLAR MASS ; SEMIEMPIRICAL ANALYSIS ; STARBURST GALAXIES ; ELLIPTIC GALAXIES ; HOST GALAXIES
引用统计
文献类型	期刊论文
版本	出版稿
条目标识符	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.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China; 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.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; [email protected]
第一作者单位	中国科学院云南天文台
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).

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