Infrared emission from P/Halley's dust coma during March 1986

Details Infrared emission from P/Halley's dust coma during March 1986 Infrared emission from P/Halley's dust coma during March 1986

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...187..653h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 187, no. 1-2, Nov. 1987, p. 653-660.

Astronomy and Astrophysics

Astronomy

46

Comet Tails, Grain Size, Halley'S Comet, Infrared Radiation, Meteoroid Dust Clouds, Silicates, Giotto Mission, Infrared Astronomy, Size Distribution, Vega Project

Scientific paper

2 to 20 μm photometry of the inner dust coma of comet Halley was obtained at the NASA IRTF on March 6.85, 12.8, 13.75, 17.7, and 24.8. Positions offset 10arcsec were measured as well as the central brightness. The strength of the 10 μm emission feature was observed to vary with location in the coma. The infrared emission is in general agreement with the dust size distribution measured from the Vega and Giotto spacecraft. March 6.8, 17.7, and 24.8 correspond to strong dust jet activity. The strength of the 10 μm silicate emission is shown to be a sensitive indicator of grain size and thus of jet activity. Dust production rate on March 13.75, 6 h before Giotto encounter, was 107g s-1.

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