Airborne and groundbased spectrophotometry of comet P/Halley from 5-13 micrometers

Details Airborne and groundbased spectrophotometry of comet P/Halley from 5-13 micrometers Airborne and groundbased spectrophotometry of comet P/Halley from 5-13 micrometers

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...187..616b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 187, no. 1-2, Nov. 1987, p. 616-620.

Astronomy and Astrophysics

Astrophysics

143

Halley'S Comet, Infrared Spectra, Spectrophotometers, Continuous Radiation, Hydrocarbons, Interplanetary Dust, Silicates

Scientific paper

Spectrophotometry from 5 - 10 μm (Δλ/λ ≈ 0.02) of comet Halley was obtained from the Kuiper Airborne Observatory on 1985 December 12.1 and 1986 April 8.6 and 10.5 UT. 8 - 13 μm data were obtained on 17.2 December 1985 from the Nickel Telescope at Lick Observatory. The spectra show a strong broad emission band at 10 μm and a weak feature at 6.8 μm. The authors do not confirm the strong 7.5 μm emission feature observed by the Vega 1 spacecraft. Color temperatures significantly higher than the equilibrium blackbody temperature indicate that small particles are abundant in the coma. Significant spatial and temporal variations in the spectrum have been observed and show trends similar to those observed by the spacecraft and from the ground. Temporal variability of the silicate emission relative to the 5 - 8 μm continuum suggests that there are at least two physically separate components of the dust.

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