Imaging of H2O+ in the coma of comet Halley

C. B. Cosmovici, G. Schwarz, W. H. Ip, Uwe - Fink

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Previous investigations applying the "ring masking" technique to CCD images obtained at the South African Observatory in the period 13-18 March 1986, led to the detection of CN, C2, C3 and ([OI] + NH2) jet features in the coma of comet Halley (Cosmovici et al., Nature 332, 705-709, 1988). In complement to these results we report here the detection of new features in water ion emission at 6193 Å which may be used as a tracer for the time-dependent anisotropic emission profile of the water vapour from the cometary nucleus. South Africa images, as well as Catalina Observatory data with identical filters on 20 January and 7, 8 and 24 March 1986, are utilized in order to exclude instrumental errors. Because of the narrow bandwidth of the filter (6192±44 Å) other significant molecular contaminations are considerably reduced. The observed peculiar H2O features can be explained by the stronger H2O+/dust contrast in the ion tail or by a possible mechanism of negative charging of the dust in the cometary coma.

Original languageEnglish (US)
Pages (from-to)699-703
Number of pages5
JournalPlanetary and Space Science
Volume43
Issue number6
DOIs
StatePublished - 1995

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Halley's comet
coma
comet
observatories
observatory
dust
filter
filters
ion emission
Republic of South Africa
ion
masking
complement
tracers
charging
water vapor
charge coupled devices
contamination
tracer
bandwidth

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Imaging of H2O+ in the coma of comet Halley. / Cosmovici, C. B.; Schwarz, G.; Ip, W. H.; Fink, Uwe -.

In: Planetary and Space Science, Vol. 43, No. 6, 1995, p. 699-703.

Research output: Contribution to journalArticle

Cosmovici, C. B. ; Schwarz, G. ; Ip, W. H. ; Fink, Uwe -. / Imaging of H2O+ in the coma of comet Halley. In: Planetary and Space Science. 1995 ; Vol. 43, No. 6. pp. 699-703.
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AU - Ip, W. H.

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