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433 micron laser heterodyne observations of galactic CO from Mauna KeaA submillimeter heterodyne radiometer, developed for astronomical applications, uses an optically pumped laser local oscillator and a quasi-optical Schottky diode mixer. The resultant telescope-mounted system, which has a noise temperature less than 4000 K (double sideband) and high frequency and spatial resolution, has been used to detect the J = 6 to 5 rotational transition of carbon monoxide at 434 micrometers in the Orion molecular clouds. The measurements, when compared with previous millimeter-wave data, indicate that the broad carbon monoxide emission feature is produced by an optically thin gas whose temperature exceeds 180 K.
Document ID
19830032246
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Buhl, D. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Chin, G. (NASA Goddard Space Flight Center Laboratory for Extraterrestrial Physics, Greenbelt, MD, United States)
Koepf, G. A. (NASA Goddard Space Flight Center Laboratory for Extraterrestrial Physics, Greenbelt, MD; Phoenix Corp., McLean, VA, United States)
Fetterman, H. R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Peck, D. D. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Clifton, B. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Tannenwald, P. E. (MIT Lexington, MA, United States)
Goldsmith, P. F. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Erickson, N. R. (Massachusetts, University Amherst, MA, United States)
Mcavoy, N. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1981
Subject Category
Astronomy
Meeting Information
Meeting: Infrared astronomy - Scientific/military thrusts and instrumentation
Location: Washington, DC
Start Date: April 21, 1981
End Date: April 22, 1981
Accession Number
83A13464
Funding Number(s)
CONTRACT_GRANT: NSF AST-78-18728
CONTRACT_GRANT: NSF AST-79-19821
Distribution Limits
Public
Copyright
Other

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