Occultation observations of compact radio sources through Comet Halley's plasma tail

Details Occultation observations of compact radio sources through Comet Halley's plasma tail Occultation observations of compact radio sources through Comet Halley's plasma tail

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.329..698a&link_type=abstract

Nature (ISSN 0028-0836), vol. 329, Oct. 22, 1987, p. 698-700.

Astronomy and Astrophysics

Astronomy

8

Comet Tails, Cosmic Plasma, Halley'S Comet, Radio Occultation, Radio Sources (Astronomy), Plasma Turbulence, Scintillation, Comets, Halley, Occultations, Plasma, Radio Emissions, Scintillations, Comet Tails, Source, Flux, Density, Radio Methods, Telescope Methods, Earth-Based Observations, Turbulence, Parameters, Astronomy

Scientific paper

Radio sources suitable for studying the plasma tail of a comet must have a significant fraction of their flux density in the sub-arc second structure, so a set of 30 sources lying within 2° of the path of comet Halley and with a flux density of S408 ⪆ 0.8 Jy were chosen from the Molonglo Catalogue and interplanetary scintillation observations of them were made at 327 MHz. From these, four were found to be suitable for cometary scintillation observations. The authors monitored nearly simultaneously other scintillating sources outside the tail for comparison and, in contrast with earlier claims of positive detection, found no significant increase in the level of turbulence that could be attributed to the plasma tail.

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