On the interpretation of the observed cometary scintillations

Details On the interpretation of the observed cometary scintillations On the interpretation of the observed cometary scintillations

Jun 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..35l...1i&link_type=abstract

Astrophysics and Space Science, vol. 35, June 1975, p. L1-L4.

Astronomy and Astrophysics

Astronomy

5

Kohoutek Comet, Plasma-Electromagnetic Interaction, Radiant Flux Density, Radio Sources (Astronomy), Scintillation, Comet Heads, Comet Tails, Cosmic Plasma, Plasma Turbulence

Scientific paper

A previous interpretation of strong fluctuations in the intensity of a radio source observed during its occultation by the plasma tail and head of Comet Kohoutek a few days after the latter's perihelion passage is examined to explain the consequence of this interpretation that plasma irregularities moved toward the cometary nucleus with speeds of between 66 and 94 km/sec. It is shown that this reversed velocity may be associated with a nonlinear wave coupled to the turbulent plasma and propagating toward the nucleus with a typical Alfven speed. The reported abrupt cessation of the radio intensity fluctuations at a distance of 80,000 km from the nucleus is shown to be due to a rather abrupt change in the plasma density.

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