Spectroscopic Observation of Comet P/de Vico: Comparison with P/Halley and P/Brorsen-Metcalf

Details Spectroscopic Observation of Comet P/de Vico: Comparison with P/Halley and P/Brorsen-Metcalf Spectroscopic Observation of Comet P/de Vico: Comparison with P/Halley and P/Brorsen-Metcalf

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998pasj...50..343k&link_type=abstract

Publications of the Astronomical Society of Japan, v.50, p.343-347.

Astronomy and Astrophysics

Astronomy

1

Comets: Individual (P/De Vico), Solar System: General, Spectroscopy

Scientific paper

A spectroscopic observation of Comet P/de Vico in the visible region was made at Bisei Astronomical Observatory on 1995 October 11. The obtained spectrum covers the wavelengths from 5200 to 7200 Angstroms, and includes several emissions, such as C_2, NH_2, and [O I]. The ratios of the gas-production rates of C_2 and NH_2 relative to that of H_2O, Q(C_2)/Q(H_2O), and Q(NH_2)/Q(H_2O), were determined from our observation based on the Haser model. The production-rate ratio and gas-to-dust ratio were: Q(C_2)/Q(H_2O) = 0.25%, Q(NH_2)/Q(H_2O) = 0.14%, and log_ {10}[ Q(H_2O)/Af rho ] = 26.9 at the time of observation. Comet P/de Vico was similar to P/Halley from the viewpoint of the chemical composition (C_2 and NH_2 relative to the H_2O), and P/de Vico was comparable to P/Brorsen-Metcalf concerning the gas-to-dust ratio. P/de Vico was one of the most gas-rich comets ever known.

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