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Survey of molecular lines near the galactic center. I - 6-centimeter formaldehyde absorption in Sagittarius A, Sagittarius B2, and the galactic plane from 359.4 to 2.2 deg galactic longitude.The data obtained indicate that the formaldehyde is concentrated in distinct clouds to a much greater extent than atomic hydrogen. The findings suggest that most of the mass in these clouds is in the form of molecular hydrogen. The locations of four dominant clouds are reported. The strongest formaldehyde features are apparently associated with the galactic nucleus. Estimates of the hydrogen density in the clouds, based on the assumption of stability and also on a comparison with local dark clouds, indicate a number density in the range from 1000 to 10,000 per cc, and a mass of approximately 500,000 solar masses.
Document ID
19720037720
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Scoville, N. Z.
Solomon, P. M.
(Columbia University New York, N.Y., United States)
Thaddeus, P.
(NASA Goddard Institute for Space Studies; Columbia University New York, N.Y., United States)
Date Acquired
August 6, 2013
Publication Date
March 1, 1972
Publication Information
Publication: Astrophysical Journal
Volume: 172
Subject Category
Space Sciences
Accession Number
72A21386
Funding Number(s)
CONTRACT_GRANT: AF 49(638)-1358
CONTRACT_GRANT: NGL-33-008-012
Distribution Limits
Public
Copyright
Other

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