Spectrophotometric observations of the Comet Halley during the 1985-86 apparition

Details Spectrophotometric observations of the Comet Halley during the 1985-86 apparition Spectrophotometric observations of the Comet Halley during the 1985-86 apparition

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.235..457d&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 235, Nov. 15, 1988, p. 457-464. CNPq-supported research

Astronomy and Astrophysics

Astrophysics

15

Astronomical Photometry, Astronomical Spectroscopy, Comet Nuclei, Halley'S Comet, Continuous Radiation, Cosmic Dust, Emission Spectra

Scientific paper

Spectrophotometric observations of Comet Halley in the wavelength range 3600-7000 A during the period October 15, 1985 and April 9, 1986 were made on the 1.6-m optical telescope of the National Laboratory of Astrophysics, Brazopolis, Brazil. Emission fluxes of O I (6300 A), CN (388 nm), and C2 (516 nm) are analyzed in the framework of the Haser (1957) model, and production rates of these cometary species are determined. Dust production rates in the coma of Comet Halley are derived from the continuum flux measurements at wavelength 4840 A. The spectrophotometric observations of Comet Halley show that the dust-to-gas ratio decreases with the increase of heliocentric distance of the comet.

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