Observations of waves and plasma in the environment of comet Halley

Details Observations of waves and plasma in the environment of comet Halley Observations of waves and plasma in the environment of comet Halley

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.321..290g&link_type=abstract

Nature (ISSN 0028-0836), vol. 321, May 15, 1986, p. 290, 291.

Physics

52

Electric Fields, Electrostatic Probes, Halley'S Comet, Plasma Density, Plasma Waves, Vega Project, Comet Nuclei, Electron Density (Concentration), Solar Wind, Comets, Halley, Spacecraft Observations, Mission Description, Experiments, Plasma, Waves, Apv-V, Wave And Plasma Analyser, Vega 1, Vega 2, Density, Electric Fields, Frequencies, Distance, Comet Nuclei, Amplitude, Spectra, Intensity, Equipment, Procedure

Scientific paper

The high-frequency plasma-wave analyser (APV-V) carried by the spacecraft Vega 1 and Vega 2 measured electric fields at frequencies up to 300 kHz and characteristic parameters of the ambient plasma during the encounters with comet Halley. Electric field activity at frequencies of ≡100 Hz was already significant at a distance of ≡2.5x106km from the nucleus. The plasma density, measured with Langmuir probes, was ≡104cm-3 at closest approach.

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