Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26as...75..399s&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 75, no. 3, Nov. 1988, p. 399-440. Research supported by the
Astronomy and Astrophysics
Astrophysics
2
Carbon Monoxide, Interstellar Gas, Molecular Clouds, Line Spectra, Radio Emission, Spectral Line Width
Scientific paper
The author presents an atlas of CO line intensities and widths for the kinetic temperature range 10 - 40K. The density range is 3.2×102cm-3 - 1.0×106cm-3, the range in relative abundances is 1×10-8 - 1×10-3 and the velocity field ranges from pure thermal (lower limit of linewidth) to turbulent or systematic velocities of 10 km s-1. The cloud models are spherical and have constant physical conditions. The only exception is the model with a systematic velocity field, in which the velocity field is of the standard type used in most LVG calculations. All calculations are done for a 10-level CO molecule, collision cross-sections are from Green and Chapman (1978). This paper present the J = 1 - 0 and J = 2 - 1 lines. Lines from higher rotational levels (J = 3 - 2 to J = 9 - 8) are published in Stenholm (1988).
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