A 5-GHz survey of formaldehyde in southern dark clouds

Details A 5-GHz survey of formaldehyde in southern dark clouds A 5-GHz survey of formaldehyde in southern dark clouds

May 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.191..533g&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 191, May 1980, p. 533-546.

Astronomy and Astrophysics

Astronomy

45

Absorption Spectra, Formaldehyde, Microwave Emission, Molecular Absorption, Nebulae, Radio Astronomy, Brightness Temperature, Curve Fitting, Least Squares Method, Optical Thickness

Scientific paper

Using the Parkes 64-m telescope observations of the 5-GHz formaldehyde absorption line at 226 positions in the direction of southern dark nebulae were made. The absorption line was detected at 169 of these positions and extended integrations were obtained on 12 objects and the resulting profiles are used to determine excitation temperatures, optical depths and line velocities by least-squares fitting of model profiles. The distribution of H2CO was mapped in three larger objects, and the resultant maps are compared with other molecular-line observations.

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