352 citations · 3.6k across the 53 of their papers we have counts for
6 papers · 1 filter
A search for CO+ in planetary nebulae
T. A. Bell, W. Whyatt, S. Viti +1
We have carried out a systematic search for the molecular ion CO+ in a sample of 8 protoplanetary and planetary nebulae in order to determine the origin of the unexpectedly strong…
Molecular line intensities as measures of cloud masses - II. Conversion factors for specific galaxy types
T. A. Bell, S. Viti, D. A. Williams
We present theoretically-established values of the CO-to-H2 and C-to-H2 conversion factors that may be used to estimate the gas masses of external galaxies. We consider four distin…
A PDR-Code Comparison Study
M. Roellig, N. P. Abel, T. Bell +21
We present a comparison between independent computer codes, modeling the physics and chemistry of interstellar photon dominated regions (PDRs). Our goal was to understand the mutua…
Molecular dark matter in galaxies
T. A. Bell, T. W. Hartquist, S. Viti +1
Clouds containing molecular dark matter in quantities relevant for star formation may exist in minihaloes of the type of cold dark matter included in many cosmological simulations…
Starburst Models For FIR/sub-mm/mm Line Emission. I. An Expanding Supershell Surrounding A Massive Star Cluster
Lihong Yao, T. A. Bell, S. Viti +2
The effect of a newly born star cluster inside a giant molecular cloud (GMC) is to produce a hot bubble and a thin, dense shell of interstellar gas and dust swept up by the H II ex…
The chemistry of transient microstructure in the diffuse interstellar medium
T. A. Bell, S. Viti, D. A. Williams +2
Transient microstructure in the diffuse interstellar medium has been observed towards galactic and extragalactic sources for decades, usually in lines of atoms and ions, and, more…