Distribution of electron density at comet Halley from radio occultation data.

Details Distribution of electron density at comet Halley from radio occultation data. Distribution of electron density at comet Halley from radio occultation data.

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990cosre..28..254a&link_type=abstract

Cosmic Res., Vol. 28, No. 2, p. 254 - 263

Physics

Cometary Comae: Electron Densities, Comet 1986 Iii Halley

Scientific paper

The results of radio probing of the envelope of Comet Halley with coherent radio signals from the Vega 1 and Vega 2 spacecraft have been used to determine the electron density profiles N(h) in the comet as a function of the cometocentric distance. The dependences N(h) obtained show a local maximum of electron density at cometocentric distance (11.5±0.5)·103km. The distribution of electron density of the cometary plasma in the cometocentric distance range from ≡11.5·103 to ≡5·104km can be approximated by the relation N(h) ≡ h-2. The maximum electron density is reached in special experiments at a distance of ≡11.5·103km, and its value reaches ≡4·103cm-3 for March 6 and ≡2·103cm-3 for March 9, 1986.

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