Distribution of cometary ions and flow properties in Halley's Comet

Details Distribution of cometary ions and flow properties in Halley's Comet Distribution of cometary ions and flow properties in Halley's Comet

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250a.183z&link_type=abstract

In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 1: Plasma and Gas p 183-188 (SEE N87

Computer Science

1

Flux Density, Halley'S Comet, Heavy Ions, Ion Distribution, Flux (Rate), Magnetohydrodynamic Flow, Particle Motion, Vega Project, Velocity Distribution

Scientific paper

Radial profiles of heavy cometary ions were obtained with BD-3 plasma detector on VEGA-1 and -2.Cometary mantle has relatively sharp outer boundary at ≡1.5×105km and somewhat steeper than R-2 density profile. Large-scale density enhancement (≡3×104km) and small-scale ones (250 - 1000 km) were observed. Local maximum ≈4×103cm-3 at ≡12×104km suggests the ion pile-up between two flows. Nearly antisolar component of plasma velocity is ≡20 km/sec at ≡6×104km and decreases to ≡5 km/sec at ≡2.5×104km. Ion density decrease by factor of ≡3 or compression of plasma mantle occurred within 3 days between VEGA-1 and VEGA-2 fly-bys.

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