Spectroscopic Observations of Split Comet C/2001 A2 (LINEAR)

Details Spectroscopic Observations of Split Comet C/2001 A2 (LINEAR) Spectroscopic Observations of Split Comet C/2001 A2 (LINEAR)

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003pasj...55.1153f&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.55, No.6, pp. 1153-1156

Astronomy and Astrophysics

Astronomy

4

Comets: General, Comets: Individual [C/2001 A2 (Linear)], Solar System: Formation

Scientific paper

Low-dispersion spectroscopic observations of C/2001A2 (LINEAR) were performed before and after its perihelion passage. C/2001A2 (LINEAR) showed the first outburst late in 2001 March, and its visual magnitude increased by more than 5mag. In addition to this outburst, three outbursts were recognized around the perihelion passage of the comet. These outbursts are thought to be associated with splitting events of the cometary nucleus. Our first observation was performed on 2001 April4, during the first outburst. After its perihelion passage, its spectra were obtained on July2, with its normal activity, and July12, during an outburst. We determined the gas-to-dust ratios [Q(H2O) / Afρ], as well as gas production rate ratios of CN, C2, and NH2 relative to water [Q(X) / Q(H2O})] for each observation. Obtained gas-to-dust ratios (26.4-26.7) showed that C/LINEAR was a gas-rich comet. Our results showed that there were no significant changes in the gas-to-dust ratio and gas production rate ratios during 3 months around perihelion passage. In comparison with other comets, there were no significant differences in the chemical composition for C/2001A2 (LINEAR).

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