433 Micron Laser Heterodyne Observations Of Galactic CO From Mauna Kea

D. Buhl; G. A. Koepf; G. Chin; N. McAvoy; H. R. Fetterman; D. D. Peck; B. J. Clifton; P. E. Tannenwald; P. F. Goldsmith; N. R. Erickson

doi:10.1117/12.931955

27 July 1981 433 Micron Laser Heterodyne Observations Of Galactic CO From Mauna Kea

D. Buhl, G. A. Koepf, G. Chin, N. McAvoy, H. R. Fetterman, D. D. Peck, B. J. Clifton, P. E. Tannenwald, P. F. Goldsmith, N. R. Erickson

Author Affiliations +

Proceedings Volume 0280, Infrared Astronomy: Scientific/Military Thrusts and Instrumentation; (1981) https://doi.org/10.1117/12.931955
Event: 1981 Technical Symposium East, 1981, Washington, D.C., United States

Abstract

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 -4- 5 rotational transition of carbon monoxide at 434 micrometers in the Orion molecular cloud. 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.

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D. Buhl, G. A. Koepf, G. Chin, N. McAvoy, H. R. Fetterman, D. D. Peck, B. J. Clifton, P. E. Tannenwald, P. F. Goldsmith, and N. R. Erickson "433 Micron Laser Heterodyne Observations Of Galactic CO From Mauna Kea", Proc. SPIE 0280, Infrared Astronomy: Scientific/Military Thrusts and Instrumentation, (27 July 1981); https://doi.org/10.1117/12.931955

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