Observations of the 3/12/-3/13/ line of H2CO

Details Observations of the 3/12/-3/13/ line of H2CO Observations of the 3/12/-3/13/ line of H2CO

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....91...36w&link_type=abstract

Astronomy and Astrophysics, vol. 91, no. 1-2, Nov. 1980, p. 36-40.

Astronomy and Astrophysics

Astrophysics

26

Astronomical Spectroscopy, Formaldehyde, Interstellar Matter, Molecular Clouds, Orion Nebula, Absorption Spectra, Abundance, Angular Resolution, Brightness Temperature, Galactic Nuclei, Gas Density

Scientific paper

Measurements of the 3(12)-3(13) line of H2CO at 28.974 GHz have been performed with an angular resolution of 35 arcsec. The line was observed in absorption toward Sgr B2 and W33, and mapped in emission toward the Orion Molecular Cloud. Results suggest that, while most molecular cloud condensations observed in the H2CO absorption lines have densities of about 100,000 per cu cm, the H2 density in the Sgr B2 cloud is about 10 times lower, and the condensation in OMC-1 has a density which is 10 times higher.

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