Radio observations of OH in comet West 1975n

Radio observations of OH in comet West 1975n

The main lines of OH at 1667 MHz and 1665 MHz have been observed in comet West 1975n during postperihelion passage. The 1667 MHz line was observed in emission with time-varying intensity. The 1665 MHz line was initially in emission and was stronger than the 1667 MHz line but later changed to weak ab...

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Veröffentlicht in:Astrophys. J., Lett.; (United States) Lett.; (United States), 1976-10, Vol.209, p.L49
Hauptverfasser: Snyder, L. E., Webber, J. C., Crutcher, R. M., Swenson, G. W., Jr
Format: Artikel
Sprache:eng
Schlagworte:
640105 - Astrophysics & Cosmology- Galaxies
CHEMICAL COMPOSITION
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COMETS
ELECTROMAGNETIC RADIATION
ENERGY-LEVEL TRANSITIONS
HYDROGEN COMPOUNDS
HYDROXIDES
INTERACTIONS
OPACITY
OPTICAL PROPERTIES
OXYGEN COMPOUNDS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHYSICAL PROPERTIES
RADIATIONS
RADIOWAVE RADIATION
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Zusammenfassung:The main lines of OH at 1667 MHz and 1665 MHz have been observed in comet West 1975n during postperihelion passage. The 1667 MHz line was observed in emission with time-varying intensity. The 1665 MHz line was initially in emission and was stronger than the 1667 MHz line but later changed to weak absorption. Our results generally tend to support the model of ultraviolet pumping by the Sun which was proposed earlier to explain the OH observations of comet Kohoutek 1973f. (AIP)
ISSN:0004-637X
1538-4357
DOI:10.1086/182264