93 citations · 941 across the 52 of their papers we have counts for
24 papers · 1 filter
FAST search for circumstellar atomic hydrogen. II. Is BD+303639 an interacting planetary nebula?
Xu-Jia Ouyang, Yong Zhang, Albert Zijlstra +3
The young, compact, very high surface brightness but low excitation planetary nebula (PN) BD+303639 is one of the very few PNe that have been reported to exhibit the 21cm HI emissi…
The Astrometric Animation of Water Masers towards the Mira Variable BX Cam
Shuangjing Xu, Hiroshi Imai, Youngjoo Yun +20
We report VLBI monitoring observations of the 22 GHz water (HO) masers around the Mira variable BX Cam, which were carried out as a part of the EAVN Synthesis of Stellar Mase…
FAST search for circumstellar atomic hydrogen--I: the young planetary nebula IC 4997
Xu-Jia Ouyang, Yong Zhang, Albert Zijlstra +3
Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST) in Guizhou, China, we detect the 21cm neutral atomic hydrogen absorption in the young planetary nebula IC 499…
Molecules in the carbon-rich protoplanetary nebula CRL 2688
Jian-Jie Qiu, Yong Zhang, Jiang-Shui Zhang +1
We present observations of the carbon-rich protoplanetary nebula (PPN) CRL 2688 made with the Institut de Radioastronomie Millimetrique (IRAM) 30 m telescope in the 3mm and 2mm ban…
Shaping the envelope of the asymptotic giant branch star W43A with a collimated fast jet
Daniel Tafoya, Hiroshi Imai, Jose F. Gomez +3
One of the major puzzles in the study of stellar evolution is the formation process of bipolar and multi-polar planetary nebulae. There is growing consensus that collimated jets cr…
The spectra of evolved stars at 20--25\,GHz: tracing circumstellar chemistry during the asymptotic giant branch to planetary nebula transition
Yong Zhang, Wayne Chau, Jun-ichi Nakashima +1
We report an unbiased radio line survey towards the circumstellar envelopes of evolved stars at the frequency range from 20 to 25 GHz, aiming to obtain a more complete unbiased pic…