Molecular astronomy using heterodyne detection at 691 GHz

Details Molecular astronomy using heterodyne detection at 691 GHz Molecular astronomy using heterodyne detection at 691 GHz

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ijimw...5..329f&link_type=abstract

International Journal of Infrared and Millimeter Waves (ISSN 0195-9271), vol. 5, March 1984, p. 329-340.

Astronomy and Astrophysics

Astronomy

1

Infrared Astronomy, Mixing Circuits, Molecular Clouds, Optical Heterodyning, Schottky Diodes, Submillimeter Waves, Infrared Telescopes, Noise Temperature, Signal Detection, Superheterodyne Receivers

Scientific paper

Observations of the CO J = 6 - 5 transition at 691 GHz in new interstellar and planetary sources have been made. The heterodyne receiver uses an optically pumped laser local oscillator and a quasi-optical Schottky diode mixer, with measured noise temperatures consistently under 4000 K (double sideband). Continued improvements in system performance and antenna coupling have made possible the mapping of 691 GHz emission from W3, and the detection of CO J = 5 - 6 absorption in the atmosphere of Venus. A detailed description of the instrumentation and recent observational data are provided.

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