Accurate OH Maser Positions from the SPLASH Survey. III. The Final 96 deg2

doi:10.3847/1538-4365/ab655d

	Accurate OH Maser Positions from the SPLASH Survey. III. The Final 96 deg2
	Qiao,Hai-Hua 2,3; Breen,Shari L.4,5; Gómez,José F.1; Dawson,J. R.5; Walsh,Andrew J.5; Green,James A.6; Ellingsen,Simon P.7; Imai,Hiroshi 8,9; Shen,Zhi-Qiang 3,10
刊名	The Astrophysical Journal Supplement Series
	2020-02-20
卷号	247 期号:1
关键词	Catalogs Interstellar molecules Circumstellar masers Interstellar masers Star formation Asymptotic giant branch stars Post-asymptotic giant branch
ISSN号	0067-0049
DOI	10.3847/1538-4365/ab655d
英文摘要	Abstract We present high spatial resolution observations of ground-state OH masers achieved with the Australia Telescope Compact Array (ATCA). These observations targeted 253 pointing centers containing OH maser candidates at all four ground-state OH transitions identified in the Southern Parkes Large-Area Survey in Hydroxyl (SPLASH) across 96 deg2 of the southern Galactic plane (332° < l < 334° and ?2° < b < +2°, 344° < l < 355° and ?2° < b < +2°, 358° < l < 4° and +2° < b < +6°, 5° < l < 10° and ?2° < b < +2°). We detect maser emission toward 236 fields and suggest that 7 out of 17 nondetections are due to the slightly lower sensitivity of the ATCA observations, combined with some temporal variability. The superior resolution provided by the ATCA data has allowed us to identify 362 OH maser sites in the 236 target fields. Almost half (160 of 362) of these masers have been detected for the first time. Comparison between these 362 maser sites and information presented in the literature allowed us to categorize 238 sites as evolved star sites (66%), 63 as star formation (17%), 8 as supernova remnants, and 53 as unknown maser sites (15%). We present an analysis of the OH masers across the full SPLASH survey range (176 deg2) and find that the detection rate of 1.7 GHz radio continuum sources (18%) is lower than that previously found at 8.2 and 9.2 GHz (38%). We also find that the velocity separations of evolved star sites with symmetric 1612 MHz maser profiles are generally smaller than those with asymmetric profiles.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0067-0049-247-1-AB655D
内容类型	期刊论文
源URL	[http://210.72.145.45/handle/361003/10769]
专题	中国科学院国家授时中心
作者单位	1.Instituto de Astrofísica de Andalucía, CSIC, Glorieta de la Astronomía s/n, E-18008, Granada, Spain 2.National Time Service Center, Chinese Academy of Sciences, Xi’An, Shaanxi 710600, People's Republic of China; qiaohh@ntsc.ac.cn 3.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People's Republic of China 4.Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006, Australia 5.Department of Physics and Astronomy and MQ Research Centre in Astronomy, Astrophysics and Astrophotonics, Macquarie University, NSW 2109, Australia 6.CSIRO Astronomy and Space Science, Australia Telescope National Facility, P.O. Box 76, Epping, NSW 2121, Australia 7.School of Physical Sciences, Private Bag 37, University of Tasmania, Hobart, TAS 7001, Australia 8.Center for General Education, Kagoshima University, 1-21-30 Korimoto, Kagoshima 890-0065, Japan 9.Department of Physics and Astronomy, Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan 10.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, People's Republic of China
推荐引用方式 GB/T 7714	Qiao,Hai-Hua,Breen,Shari L.,Gómez,José F.,et al. Accurate OH Maser Positions from the SPLASH Survey. III. The Final 96 deg2[J]. The Astrophysical Journal Supplement Series,2020,247(1).
APA	Qiao,Hai-Hua.,Breen,Shari L..,Gómez,José F..,Dawson,J. R..,Walsh,Andrew J..,...&Shen,Zhi-Qiang.(2020).Accurate OH Maser Positions from the SPLASH Survey. III. The Final 96 deg2.The Astrophysical Journal Supplement Series,247(1).
MLA	Qiao,Hai-Hua,et al."Accurate OH Maser Positions from the SPLASH Survey. III. The Final 96 deg2".The Astrophysical Journal Supplement Series 247.1(2020).