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An HI column density threshold for cold gas formation in the Galaxy
column density threshold cold gas formation Galaxy
2011/9/28
We report the discovery of a threshold in the HI column density of Galactic gas clouds below which the formation of the cold phase of HI is inhibited. This threshold is at $N_{HI} = 2 \times 10^{20}$ ...
Modeling CO Emission: I. CO as a Column Density Tracer and the X-Factor in Molecular Clouds
Modeling CO Emission X-Factor Molecular Clouds
2010/11/12
Theoretical and observational investigations have indicated that the abundance of car-bon monoxide (CO) is very sensitive to intrinsic properties of the gaseous medium,
such as density, metallicity, ...
A fast H2O total column density product from GOME – Validation with in-situ aircraft measurements
H2O total column density GOME – Validation in-situ aircraft measurements
2009/3/10
Atmospheric water vapour is the most important greenhouse gas which is responsible for about 2/3 of the natural greenhouse effect, therefore changes in atmospheric water vapour in a changing climate (...
Effects of column density on I2 spectroscopy and a determination of I2 absorption cross section at 500 nm
column density I2 spectroscopy I2 absorption cross section
2009/1/9
The use of ro-vibronic spectra of I2 in the region of 543 nm to 578 nm as reference spectra for atmospheric Differential Optical Absorption Spectroscopy is studied. It is shown that the retrieval of a...
Comparison of high-latitude line-of-sight ozone column density with derived ozone fields and the effects of horizontal inhomogeneity
high-latitude line-of-sight ozone column density derived ozone fields effects of horizontal inhomogeneity
2009/1/8
Extensive ozone measurements were made during the second SAGE III Ozone Loss and Validation Experiment (SOLVE II). We compare high-latitude line-of-sight (LOS) slant column ozone measurements from the...