Edge-on H i-bearing Ultra-diffuse Galaxy Candidates in the 40% ALFALFA Catalog

doi:10.3847/1538-4357/ab2710

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	Edge-on H i-bearing Ultra-diffuse Galaxy Candidates in the 40% ALFALFA Catalog
	He,Min 2,3; Wu,Hong 2,3; Du,Wei 3; Wicker,James 1; Zhao,Pingsong 2,3; Lei,Fengjie 2,3; Liu,Jifeng 2,3
刊名	The Astrophysical Journal
	2019-07-22
卷号	880 期号:1
关键词	galaxies: evolution galaxies: formation radio lines: galaxies
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab2710
英文摘要	Abstract Ultra-diffuse galaxies are objects that have very extended morphology and faint central surface brightness. Most UDGs are discovered in galaxy clusters and groups, but some are also found in low-density environments. The diffuse morphology and faint surface brightness make them difficult to distinguish from the sky background. Several previous works have suggested that at least some UDGs are consistent with exponential surface brightness profiles). The surface brightness of exponential disks is enhanced in edge-on systems, so searching for edge-on systems may be an efficient way to select UDGs. In this paper, we focus on searching for edge-on H i-bearing ultra-diffuse sources (HUDS) from the 40% Arecibo Legacy Fast ALFA (ALFALFA) catalog, based on Sloan Digital Sky Survey g- and r-band images. After correcting the observed central surface brightness to a face-on perspective, we discover 11 edge-on HUDS candidates. All these newly discovered HUDS candidates are blue and H i-bearing, similar to other HUDS in 70% ALFALFA catalog, and different from UDGs in clusters.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-880-1-AB2710
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/28780]
专题	中国科学院国家天文台
作者单位	1.Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100101, People’s Republic of China 2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, 19A Yuquan Road, Shijingshan District, Beijing, 100049, People’s Republic of China 3.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100101, People’s Republic of China; hemin13@live.com, hwu@bao.ac.cn, wdu@bao.ac.cn
推荐引用方式 GB/T 7714	He,Min,Wu,Hong,Du,Wei,et al. Edge-on H i-bearing Ultra-diffuse Galaxy Candidates in the 40% ALFALFA Catalog[J]. The Astrophysical Journal,2019,880(1).
APA	He,Min.,Wu,Hong.,Du,Wei.,Wicker,James.,Zhao,Pingsong.,...&Liu,Jifeng.(2019).Edge-on H i-bearing Ultra-diffuse Galaxy Candidates in the 40% ALFALFA Catalog.The Astrophysical Journal,880(1).
MLA	He,Min,et al."Edge-on H i-bearing Ultra-diffuse Galaxy Candidates in the 40% ALFALFA Catalog".The Astrophysical Journal 880.1(2019).