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Formaldehyde Abundances in the Dense Molecular Cores DR 21 and W 3(OH)

Published online by Cambridge University Press:  04 August 2017

H. R. Dickel ,
W. M. Goss  and
A. H. Rots
H. R. Dickel
Affiliation:
Astronomy Department University of Illinois 349 Astronomy Building 1011 W. Springfield Avenue Urbana, IL 61801 USA
W. M. Goss
Affiliation:
Kapteyn Astronomical Institute University of Groningen Postbus 800 9700 AV Groningen the Netherlands
A. H. Rots
Affiliation:
National Radio Astronomy Observatory Very Large Array Program Box O Socorro, NM 87801 USA

Abstract

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Formaldehyde absorption has been observed with the Very Large Array in both the 6 cm and 2 cm transitions towards a number of ultracompact HII regions which are embedded in the dense cores of molecular clouds. Such data have been compared with the results of radiative transfer calculations to derive the distributions of the molecular hydrogen density and of the abundance of formaldehyde relative to molecular hydrogen. Results are presented for the sources DR 21 and W 3(OH).

Type
Interstellar Medium
Information
Symposium - International Astronomical Union , Volume 120: Astrochemistry , 1987 , pp. 185 - 186
Copyright
Copyright © Reidel 1987 

References

Dickel, H.R., Goss, W.M., Rots, A.H., Blount, H.M.: 1985, Astron. Astrophys. submitted Google Scholar
Dickel, H.R., Goss, W.M.: 1986 in preparation Google Scholar
Dickel, H.R., Lubenow, A.F., Goss, W.M., Forster, J.R., Rots, A.H.: 1983, Astron. Astrophys. 120, 74 Google Scholar
Dickel, H.R., Lubenow, A.F., Goss, W.M., Rots, A.H.: 1984, Astron. Astrophys. 135, 107 Google Scholar
Guilloteau, S., Stier, M.T., Downes, D.: 1983, Astron. Astrophys. 126, 10 Google Scholar