7 papers
FAST search for circumstellar atomic hydrogen. IV. bubbles associated with planetary nebulae
Jun-Yang Liu, Yong Zhang, Xu-Jia Ouyang
Investigating the bubbles generated by the interaction between asymptotic giant branch stellar outflows and the interstellar medium (ISM) is pivotal for elucidating the mechanism b…
The Missing Giant: Do FAST Spectroscopic Observations Reveal a Scarcity of Large Polycyclic Aromatic Hydrocarbons in Astronomical Environments?
Yi Shao, Yong Zhang, Xu-Jia Ouyang +1
The search for large polycyclic aromatic hydrocarbons (PAHs) with over 100 carbon atoms is crucial to resolving the origin of unidentified infrared emission (UIE) bands. These band…
Gas-phase Molecules in Protoplanetary Nebulae with the 21 μm Emission Feature II. Carbon monosulfide
Jian-Jie Qiu, Yong Zhang, Deng-Rong Lu +7
The carrier of the 21 m emission feature discovered in a handful of protoplanetary nebulae (PPNe) is one of the most intriguing enigmas in circumstellar chemistry. Investigating…
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…
FAST search for circumstellar atomic hydrogen. III. Planetary nebulae at Galactic latitudes |b|>10degree
Xu-Jia Ouyang, Yong Zhang, Albert Zijlstra +4
The detection of circumstellar atomic hydrogen (\ion{H}{1}) via the 21\,cm line remains a persistent challenge in planetary nebula (PN) studies, primarily due to contamination from…
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.…