52 citations · 91 across the 7 of their papers we have counts for
5 papers · 1 filter
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…
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…
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…