H_2_O^+^, CO^+^, and dust in Comet P/Swift-Tuttle.

Details H_2_O^+^, CO^+^, and dust in Comet P/Swift-Tuttle. H_2_O^+^, CO^+^, and dust in Comet P/Swift-Tuttle.

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...319..617j&link_type=abstract

Astronomy and Astrophysics, v.319, p.617-629

Astronomy and Astrophysics

Astrophysics

12

Comets: General, P/Halley, 109P/Swift-Tuttle

Scientific paper

Comet P/Swift-Tuttle was observed in the light of H_2_O^+^, CO^+^ and continuum with the 2-m telescope of the Bulgarian National Astronomical Observatory (BNAO) on Nov. 25, 1992. We present column density maps of the H_2_O^+^ and CO^+^ ions and a map of the product of filling factor, geometrical albedo, and phase function. The H_2_O^+^ ions are more concentrated toward the nucleus than CO^+^. The ion distributions are in close agreement with magnetohydrodynamic models including photochemistry of H_2_O^+^, CO^+^ and their parents. The color of a spiral dust jet present in the continuum image was redder than the color of the ambient dust. The observations demonstrate the similarity between comets P/Halley and P/Swift-Tuttle.

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