33 citations · 113 across the 8 of their papers we have counts for
8 papers
Current Unsolved Problems in Planetary Nebulae Research
Sun Kwok, Bruce Balick, You-Hua Chu +5
While there has been significant progress in our understanding of the origin and evolu-tion of planetary nebulae in the last 50 years, there remain several unsolved problems. These…
Planetary Nebulae Research: Past, Present, and Future
Sun Kwok
We review the evolution of our understanding of the planetary nebulae phenomenon and their place in the scheme of stellar evolution. The historical steps leading to our current und…
A far-ultraviolet-driven photoevaporation flow observed in a protoplanetary disk
Olivier Berné, Emilie Habart, Els Peeters +143
Most low-mass stars form in stellar clusters that also contain massive stars, which are sources of far-ultraviolet (FUV) radiation. Theoretical models predict that this FUV radiati…
Search for Hydrogenated C (fulleranes) in Circumstellar Envelopes
Yong Zhang, SeyedAbdolreza Sadjadi, Chih-Hao Hsia +1
The recent detection of fullerene (C) in space and the positive assignment of five diffuse interstellar bands to C reinforce the notion that fullerene-related compo…
The 6 m Feature as A Tracer of Aliphatic Components of Interstellar Carbonaceous Grains
Chih-Hao Hsia, Seyedabdolreza Sadjadi, Yong Zhang +1
An unidentified infrared emission (UIE) feature at 6.0 m is detected in a number of astronomical sources showing the UIE bands. In contrast to the previous suggestion that this…
A Theoretical Study on the Vibrational Spectra of PAH Molecules with Aliphatic Sidegroups
SeyedAbdolreza Sadjadi, Yong Zhang, Sun Kwok
The role of aliphatic side groups on the formation of astronomical unidentified infrared emission (UIE) features is investigated by applying the density functional theory (DFT) to…
A Molecular Line Survey of the Carbon-Rich Proto-Planetary Nebula AFGL 2688 in the 3mm and 1.3mm Windows
Yong Zhang, Sun Kwok, Jun-ichi Nakashima +2
We present a spectral line survey of the proto-planetary nebula AFGL 2688 in the frequency ranges of 71-111 GHz, 157-160 GHz, and 218-267 GHz using the Arizona Radio Observatory 12…
SiO and H2O Maser Observations of Red Supergiants in Star Clusters Embedded in the Galactic Disk
S. Deguchi, J. Nakashima, Y. Zhang +3
We present the result of radio observations of red supergiants in the star cluster, Stephenson's #2, and candidates for red supergiants in the star clusters, Mercer et al. (2005)'s…