First images of a possible CO(+)-tail of comet P/Schwassmann-Wachmann 1 observed against the dust coma background

Details First images of a possible CO(+)-tail of comet P/Schwassmann-Wachmann 1 observed against the dust coma background First images of a possible CO(+)-tail of comet P/Schwassmann-Wachmann 1 observed against the dust coma background

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992acm..proc..261j&link_type=abstract

In Lunar and Planetary Inst., Asteroids, Comets, Meteors 1991 p 261-264 (SEE N93-19113 06-90)

Computer Science

Absorption Spectra, Brightness Distribution, Comet Nuclei, Comet Tails, Cometary Atmospheres, Continuums, Interplanetary Dust, Schwassmann-Wachmann Comet, Bulgaria, Crystallization, Ice, Observatories, Telescopes

Scientific paper

Comet P/Schwassmann-Wachmann 1 was observed with the 2m-Ritchey-Cretien Telescope of the Bulgarian National Observatory, Rozhen, Bulgaria, using the CCD-camera and focal reducer of the Max-Planck-Institute for Aeronomy. Images were taken in a red continuum window and in the 2-0 A2Pi - X2Sigma(+) band of CO(+) located in the blue part of the spectrum. The red images reveal an extended dust coma. From a comparison of the red and blue images a dust reddening of 13.2 percent per 1000 A is derived. At 642 nm the magnitude of the comet with a square diaphragm of 4.5 arcsec is 16.6. The blue images, taken in the CO(+) band, show a significantly different brightness distribution which is interpreted as presence of a CO(+) coma and tail superimposed on the continuum. A column density of several 1010 CO(+) molecules cm-2 is derived. The tail thickness of 105 km is unexpectedly small. We estimate the CO(+) production rate to about 6 x 1026 CO(+) particles s-1. This value does not support the idea that the outbursts of this comet are caused by crystallization of amorphous water ice.

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