Molecular astronomy using heterodyne detection at 691 GHz

Journal Article · Thu Mar 01 04:00:00 EST 1984 · Int. J. Infrared Millimeter Waves; (United States)

OSTI ID:6116708

Fetterman, H R; Buhl, D

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. 14 references.

• Research Organization: MIT, Lexington, MA
• OSTI ID: 6116708
• Journal Information: Int. J. Infrared Millimeter Waves; (United States), Journal Name: Int. J. Infrared Millimeter Waves; (United States) Vol. 5; ISSN IJIWD
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
640107 -- Astrophysics & Cosmology-- Planetary Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COSMIC GASES
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUIDS
GASES
H2 REGIONS
HETERODYNE RECEIVERS
INFRARED RADIATION
MICROWAVE EQUIPMENT
MOLECULES
OXIDES
OXYGEN COMPOUNDS
PLANETARY ATMOSPHERES
PLANETS
RADIATIONS
RADIO EQUIPMENT
VENUS PLANET