Radio OH observation of Halley's Comet

Details Radio OH observation of Halley's Comet Radio OH observation of Halley's Comet

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250c.113c&link_type=abstract

In ESA, Proceedings of the 20th ESLAB Symposium on the Exploration on Halley's Comet. Volume 3: Posters p 113-115 (SEE N87-26714

Astronomy and Astrophysics

Astronomy

Emission Spectra, Halley'S Comet, Hydroxyl Emission, Radio Astronomy, Circular Polarization, Comet Nuclei, Cometary Atmospheres, Space Observations (From Earth)

Scientific paper

Halley comet was observed with the Arecibo Telescope in OH-lines at 1665 and 1667 MHz during 29 days from 1 October till 15 December, 1986. Left and right circular polarization in the frequency switching mode were measured. With the circular antenna beam of 3 arcmin the coma was resolved. Nucleus position for each day and 4 positions, one beam off the nucleus, were observed. Time sequences of line parameters as peak intensity, area, half-power width and peak frequency were determined. OH flux higher than expected has been observed in off nucleus positions. The gas production rate has been derived with the Haser model.

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