Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981spie..280..108b&link_type=abstract
In: Infrared astronomy - Scientific/military thrusts and instrumentation; Proceedings of the Meeting, Washington, DC, April 21,
Astronomy and Astrophysics
Astronomy
Astronomical Spectroscopy, Carbon Monoxide, Infrared Lasers, Infrared Telescopes, Molecular Clouds, Orion Nebula, Hawaii, Laser Pumping, Laser Spectroscopy, Milky Way Galaxy, Optical Heterodyning, Radiometers, Space Observations (From Earth), Submillimeter Waves, Systems Engineering
Scientific paper
A 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.
Buhl David
Chin Gordon
Clifton B. J.
Erickson Neal R.
Fetterman Harold R.
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