Radio observations of PKS2314+03 during occultation by comet Halley

Details Radio observations of PKS2314+03 during occultation by comet Halley Radio observations of PKS2314+03 during occultation by comet Halley

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.322..439a&link_type=abstract

Nature (ISSN 0028-0836), vol. 322, July 31, 1986, p. 439-441. Research supported by the Department of Space, Science and Technol

Physics

10

Comet Tails, Extragalactic Radio Sources, Halley'S Comet, Occultation, Scintillation, Ion Density (Concentration), Radiant Flux Density, Solar Wind

Scientific paper

Strong interplanetary scintillations were recorded at 103 MHz at Thaltej between 18 and 20 December 1985, when the quasar PKS 2314+03 was occulted by the ion tail of comet Halley. The scintillation periodicities were near 1 s and their amplitudes decreased progressively as the source approached the end of the tail. The r.m.s density variations were 10, 6 and 3 electrons cm-3 on 18, 19 and 20 December respectively, and varied with distance r from cometary nucleus as r-3.3. Assuming an ion velocity of 100 km s-1, it is shown that the observed periodicity of 1 s implies ion density inhomogeneities of the order of 100 km.

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