5 papers
A 3mm molecular line survey toward IRC+10216
Yi-Na Ao, Yong Zhang, Jian-Jie Qiu +2
IRC+10216 is the brightest infrared source in the northern sky, known for its rich chemical composition. It is often used as a standard reference for studying the circumstellar env…
A molecule-rich torus-like structure in the 21 m source IRAS 23304+6147
Hao-Min Sun, Yong Zhang, Xu-Jia Ouyang +4
A long-standing enigma in observational astronomy is the identification of the so-called 21 m feature in a subset of envelopes of post-asymptotic giant branch (post-AGB) stars.…
Considerations on the Origin of IRAS 19312+1950 Based on Long-Term Maser Observations
Huan-Xue Feng, Jun-ichi Nakashima, D. Engels +5
IRAS source 19312+1950 (hereafter I19312) is an infrared point source with maser emissions of SiO, HO, and OH molecules. Although initial observations suggested that I19312 mig…
A 3 mm line survey towards the circumstellar envelope of the carbon-rich AGB star IRC+10216 (CW Leo)
Juan Tuo, Xiaohu Li, Jixian Sun +14
We present an unbiased 3 mm spectral line survey (between 84.5 and 115.8 GHz), conducted by the Purple Mountain Observatory 13.7 meter radio telescope, together with updated mo…
Systematic Search for Water Fountain Candidates using the Databases of Circumstellar Maser Sources
Haichen Fan, Jun-ichi Nakashima, D. Engels +6
Water fountains (WFs) are thought to be objects in the morphological evolution of the circumstellar envelopes of low- and intermediate-mass evolved stars, transitioning from spheri…