Spatial Distribution of Heavy Ions in Comet p/ Halley's Coma

Details Spatial Distribution of Heavy Ions in Comet p/ Halley's Coma Spatial Distribution of Heavy Ions in Comet p/ Halley's Coma

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...187..183v&link_type=abstract

Astronomy and Astrophysics, Vol. 187, NO. 1&2/NOV(I), P. 183, 1987

Astronomy and Astrophysics

Astrophysics

19

Scientific paper

Radial profiles of heavy cometary ions at large solar zenith angles were obtained with the BD-3 plasma detector. The relatively sharp (thickness ˜8000 km) boundary at ˜1.5×105km of the region where cometary ions dominate, may result from a violation of the frozen-in condition of solar wind protons along the field lines. The density of the heavy ions mantle varies approximately as R-2. A large-scale density enhancement was observed during the inbound crossing at 65,000 - 25,000 km on March 6, 1986. Many small-scale (250 - 1,000 km) density enhancements were observed. A local maximum of ˜4×103cm-3 at ≍1.2×104km was observed on inbound and on outbound trajectories of Vega-1 which shows the permanent existence of this pile-up feature. Data on the bow shock crossing and on the mantle density distribution are discussed and compared with the data of other experiments.

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