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Multiple collisions in N59 bubble: Sequential cloud-cloud collisions
En Chen, Xi Chen, Xuepeng Chen +2
We report that the gas components in the N59 bubble suffered from sequential multiple cloud-cloud collision (CCC) processes. The molecular gas in the N59 bubble can be decomposed i…
FAST detection of OH emission in the carbon-rich planetary nebula NGC 7027
Xu-Jia Ouyang, Yong Zhang, Chuan-Peng Zhang +8
We present the first detection of the ground-state OH emission line at 1612 MHz toward the prototypical carbon-rich planetary nebula (PN) NGC 7027, utilizing the newly installed ul…
Excited-State OH Masers in the Water Fountain Source IRAS 18460-0151
Xu-Jia Ouyang, Yong Zhang, Juan Li +3
Water fountain objects are generally defined as "evolved stars with low to intermediate initial mass accompanied by high-velocity molecular jets detectable in the 22.235 GHz HO…
Distribution Properties of the 6.7 GHz Methanol Masers and Their Surrounding Gases in the Milky Way
Tian Yang, Xi Chen, Yan-Kun Zhang +4
An updated catalog consisting of 1092 6.7-GHz methanol maser sources was reported in this work. Additionally, the NH3 (1, 1), NH3 (2, 2), and NH3 (3, 3) transitions were observed t…