20 citations · 21 across the 2 of their papers we have counts for
6 papers · 1 filter
Rethinking the N(H2)/I(CO) Conversion Factor
W. F. Wall
An improved formulation for the X-factor is proposed. The statement that the velocity-integrated radiation temperature of the $\COone$ line, $I(\CO)$, ``counts'' optically thick cl…
Comparison of 13CO Line and Far-Infrared Continuum Emission as a Diagnostic of Dust and Molecular Gas Physical Conditions: II. The Simulations: Testing the Method
W. F. Wall
The reliability of modeling the far-IR continuum to 13CO J=1-0 spectral line ratios applied to the Orion clouds (Wall 2006) is tested by applying the models to simulated data. The…
Comparison of 13CO Line and Far-Infrared Continuum Emission as a Diagnostic of Dust and Molecular Gas Physical Conditions: III. Systematic Effects and Scientific Implications
W. F. Wall
Far-infrared continuum data from the {\it COBE}/{\it DIRBE} instrument were combined with Nagoya 4-m $\cOone$ spectral line data to infer the multiparsec-scale physical conditions…
Comparison of 13CO Line and Far-Infrared Continuum Emission as a Diagnostic of Dust and Molecular Gas Physical Conditions: I. Motivation and Modeling
W. F. Wall
Determining temperatures in molecular clouds from ratios of CO rotational lines or from ratios of continuum emission in different wavelength bands suffers from reduced temperature…
Changing Molecular Gas Properties in the Bar and Canter of NGC7479
S. Huettemeister, S. Aalto, M. Das +1
We present sensitive interferometric 12CO, 13CO and HCN observations of the barred spiral galaxy NGC7479, known to be one of the few barred galaxies with a continuous gas-filled ba…
The discovery of a gas-rich bar in UGC 2855: A galaxy in a pre-starburst phase?
S. Huettemeister, S. Aalto, W. F. Wall
We present the first interferometric CO observations of the barred late-type galaxy UGC2855 and its companion UGC2866. UGC2855 is shown to belong to the rare class of galaxies with…