6 cm OH Masers in Northern Star Formation Regions

doi:10.3847/1538-4357/ac5820

NTSC-IR > 守时理论与方法研究室

	6 cm OH Masers in Northern Star Formation Regions
	Qiao,Hai-Hua 1,2; Shen,Zhi-Qiang 2,3; Breen,Shari L.4; Yang,Kai 5,6; Chen,Xi 7; Li,Juan 2,3
	2022-04-01
发表期刊	The Astrophysical Journal
ISSN	0004-637X
卷号	928 期号:2
摘要	Abstract We have used the Shanghai Tianma Radio Telescope to search for three OH transitions at 4.7 GHz toward 155 northern star formation regions. We detect 4.7 GHz OH masers in 18 star formation regions, 8 of which are reported here for the first time. From these 18 sources, we detect 6 4660 MHz masers, 13 4765 MHz masers, and no 4750 MHz masers. A further 1 source (Sgr B2N) has been re-detected with broad quasi-thermal emission in all three OH lines. W49SW was re-detected with broad quasi-thermal emission at both 4660 and 4750 MHz. One source (W31, G010.626?0.387) was re-detected with quasi-thermal emission at both 4750 and 4765 MHz. One source (G005.885?0.392) was first detected with quasi-thermal emission at 4660 MHz. We have investigated the associations between the detected 4.7 GHz OH masers with ground-state OH masers near 1.7 GHz, 6.7 GHz methanol masers and 22 GHz water masers reported in the literature. We find that the presence of 1665 MHz OH masers is a better indicator of the presence of 4.7 GHz OH masers than 1720 MHz OH masers. The majority of the 4.7 GHz OH masers are associated with 6.7 GHz methanol and/or 22 GHz water masers. We have compared the characteristics of our detections with those reported previously in the literature and found that only five sources are fairly stable.
DOI	10.3847/1538-4357/ac5820
语种	英语
WOS记录号	IOP:apj_928_2_129
出版者	The American Astronomical Society
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/13829
专题	守时理论与方法研究室
通讯作者	Qiao,Hai-Hua
作者单位	1.National Time Service Center, Chinese Academy of Sciences, Xi’An, Shaanxi, 710600, People's Republic of China; qiaohh@ntsc.ac.cn 2.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai, 200030, People's Republic of China 3.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, People's Republic of China 4.SKA Observatory, Jodrell Bank, Lower Withington, Macclesfield, SK11 9FT, UK 5.School of Astronomy and Space Science, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, People's Republic of China 6.Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing 210023, People's Republic of China 7.Center for Astrophysics, Guangzhou University, Guangzhou 510006, People's Republic of China
推荐引用方式 GB/T 7714	Qiao,Hai-Hua,Shen,Zhi-Qiang,Breen,Shari L.,et al. 6 cm OH Masers in Northern Star Formation Regions[J]. The Astrophysical Journal,2022,928(2).
APA	Qiao,Hai-Hua,Shen,Zhi-Qiang,Breen,Shari L.,Yang,Kai,Chen,Xi,&Li,Juan.(2022).6 cm OH Masers in Northern Star Formation Regions.The Astrophysical Journal,928(2).
MLA	Qiao,Hai-Hua,et al."6 cm OH Masers in Northern Star Formation Regions".The Astrophysical Journal 928.2(2022).