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Search for CO in Atomic Hydrogen Clouds

Published online by Cambridge University Press:  14 August 2015

I. Kazès
Affiliation:
Département de Radioastronomie, Observatoire de Meudon
J. Crovisier
Affiliation:
Département de Radioastronomie, Observatoire de Meudon

Extract

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The relationship between dense molecular clouds and diffuse clouds, as well as the mechanisms connected with the formation of molecules in diffuse clouds, may be studied using HI 21-cm line observations and molecular line observations in the same directions. For this purpose we previously studied the OH 18-cm main lines (Kazès et al., 1977) and the 2.6-mm CO lines (Crovisier and Kazès, 1977) in directions where strong 21-cm absorption features had been detected in the Nancay survey (Crovisier et al., 1978). Liszt and Burton (1979) also measured CO lines toward 19 directions observed in the Arecibo 21-cm emission/absorption survey (Dickey et al., 1978). This paper presents preliminary results of a more comprehensive search for 12CO in directions previously studied in the Nancay survey.

Type
Research Article
Copyright
Copyright © Reidel 1980 

References

Crovisier, J., and Kazès, I.: 1977, paper presented at the 21st Liege International Astrophysical Symposium.Google Scholar
Crovisier, J., Kazès, I., and Aubry, D.: 1978, Astron. Astrophys. Suppl. 32, pp. 205-282.Google Scholar
Dickey, J.M., Salpeter, E.E., and Terzian, Y.: 1978, Astrophys. J. Suppl. 36, pp. 77-114.Google Scholar
Kazès, I., Crovisier, J., and Aubry, D.: 1977, Astron. Astrophys. 58, pp. 403-410.Google Scholar
Liszt, H.S., and Burton, W.B.: 1979, Astrophys. J. 228, pp. 105-111.Google Scholar