CO observations of southern high-latitude clouds

Details CO observations of southern high-latitude clouds CO observations of southern high-latitude clouds

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...304..466k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 304, May 1, 1986, p. 466-480. Research supported by the Harvard College Obs

Astronomy and Astrophysics

Astrophysics

109

Carbon Monoxide, Interstellar Gas, Molecular Clouds, Gravitation, Milky Way Galaxy, Southern Sky, Virial Theorem

Scientific paper

Results from a survey of 2.6 mm emission in the J = 1 to 0 transition of CO of clouds are reported for 15 high Galactic latitude clouds and three clouds located on the fringe of a large molecular cloud in the Chameleon dark cloud complex. The line widths, excitation temperatures, sizes, and n(CO)/N(H2) ratio of these clouds are similar to those seen in dark clouds. The densities, extinctions, and masses of the high-latitude clouds are one order of magnitude less than those found in dark clouds. For its size and velocity dispersion, the typical cloud has a mass of at least 10 times less than that needed to bind the cloud by self-gravity alone. External pressures are needed to maintain the typical cloud in equilibrium, and these values are consistent with several estimates of the intercloud pressure.

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