52 citations · 91 across the 7 of their papers we have counts for
7 papers
Gas-phase molecules in protoplanetary nebulae with the 21 μm emission feature
Jian-Jie Qiu, Yong Zhang, Jun-ichi Nakashima +6
It has been more than 30 years since the enigmatic 21 μm emission feature was first discovered in protoplanetary nebulae (PPNs). Although dozens of different dust carrier candidate…
A 3 mm Molecular Line Survey toward The C-star Envelope CIT 6
Kui-Lu Yang, Yong Zhang, Jian-Jie Qiu +2
We present an unbiased molecular line survey toward the carbon-rich circumstellar envelope CIT 6 carried out between 90 and 116 GHz with the Arizona Radio Observatory 12 m telescop…
Molecules in the peculiar age-defying source IRAS 19312+1950
Jian-Jie Qiu, Yong Zhang, Jun-ichi Nakashima +5
Context. IRAS 19312+1950 is an isolated infrared source that exhibits a characteristic quasi-point-symmetric morphology in the near- and mid-infrared images and is also very bright…
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…
λ = 2 mm spectroscopy observations toward the circumnuclear disk of NGC 1068
Jianjie Qiu, Jiangshui Zhang, Yong Zhang +2
Aims. We investigate the physical and chemical conditions of molecular gas in the circumnuclear disk (CND) region of NGC 1068. Methods. We carried out a spectral line survey with t…
The MALATANG Survey: the L_gas-L_IR correlation on sub-kiloparsec scale in six nearby star-forming galaxies as traced by HCN J=4-3 and HCO^+ J=4-3
Qing-Hua Tan, Yu Gao, Zhi-Yu Zhang +43
We present HCN J=4-3 and HCO^+ J=4-3 maps of six nearby star-forming galaxies, NGC 253, NGC 1068, IC 342, M82, M83, and NGC 6946, obtained with the James Clerk Maxwell Telescope as…
The dependence of the IR-radio correlation on the metallicity
Jianjie Qiu, Yong Shi, Junzhi Wang +2
We have compiled a sample of 26 metal-poor galaxies with 12 + log(O/H) < 8.1 with both infrared continuum and 1.4 GHz radio continuum data. By comparing to galaxies at higher metal…