Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...323..145e&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 323, Dec. 1, 1987, p. 145-153.
Astronomy and Astrophysics
Astronomy
25
Absorption Spectra, Formaldehyde, Molecular Clouds, Radio Astronomy, Relic Radiation, Very Large Array (Vla), Astronomical Spectroscopy, Interstellar Matter, Spectral Energy Distribution, Virial Theorem
Scientific paper
The authors have used the VLA to observe 6 cm H2CO absorption in the S140 molecular cloud. They conclude that they are observing anomalous absorption (absorption of the cosmic background radiation). The absorption shows structure on scales from 20arcsec to 4arcmin. It is possible to construct a consistent model in which the absorption arises primarily in the lower density envelopes of the dense clumps inferred from multitransition studies of this region. The virial theorem applied to the clumps gives a total mass of 560 - 700 M_sun; for this region, with perhaps 40 M_sun; per clump. It is possible that these clumps represent the first stages in the fragmentation of this portion of the cloud.
Evans Neal J. II
Kutner Marc L.
Mundy Lee G.
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