The Spectrum of Comet p/ Halley Between 0.9-MICRONS and 2.5-MICRONS

Details The Spectrum of Comet p/ Halley Between 0.9-MICRONS and 2.5-MICRONS The Spectrum of Comet p/ Halley Between 0.9-MICRONS and 2.5-MICRONS

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...187..398m&link_type=abstract

Astronomy and Astrophysics, Vol.187, NO. 1+2/NOV, P. 398, 1987

Astronomy and Astrophysics

Astrophysics

10

Scientific paper

High resolution Fourier-transform spectra of comet P/Halley have been recorded at the CFH 3.60 m telescope (Hawaii) on 1985 December 20 - 23, and 1986 April 28 - 30. The spectral interval ranges from 3800 to 12000 cm-1 (0.83 to 2.6 μm) and the spectral resolution is equal to 10 cm-1. Dust temperatures of 300±40K and 240±40K are derived for 1985 December 20 - 23, and 1986 April 28 - 30, respectively, from the slope of the thermal component. Bands of the CN red system are observed at 1.46 μm (1-2), 1.10 μm (0-0), 0.94 μm (2-1), and 0.92 μm (1-0). In addition, an emission feature centered at 2.44 μm (4100 cm-1) is detected. The authors tentatively identify this feature as the ν1+ν3-2ν2 band of H2O. Ground-based monitoring of this feature on future bright comets may be a direct method for measuring their H2O production rate.

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