Scintillation of a radio source observed through the tail of Comet Halley

Details Scintillation of a radio source observed through the tail of Comet Halley Scintillation of a radio source observed through the tail of Comet Halley

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.325..699s&link_type=abstract

Nature (ISSN 0028-0836), vol. 325, Feb. 19, 1987, p. 699-701.

Astronomy and Astrophysics

Astronomy

8

Halley'S Comet, Radio Scattering, Radio Sources (Astronomy), Scintillation, Comet Tails, Electron Density (Concentration), Occultation, Space Plasmas, Wave Diffraction

Scientific paper

On March 29, 1986 between 16:00 and 23:00 UT the strong compact radio source 1827-360 was observed as the plasma tail of Comet Halley swept across the source. The appearance of weak intensity fluctuations was noted during the interval 17:00 to 19:00 UT when the sun, the comet's nucleus, and the radio source were accurately aligned. This behavior is interpreted as the result of diffraction of radio waves by electron-density irregularities in the plasma tail. At a distance 5.4 million km downstream from the cometary nucleus, the central part of the plasma tail contained electron density irregularities about 14 times as strong as those in the undisturbed solar wind.

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