Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984p%26ss...32.1273t&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 32, Oct. 1984, p. 1273-1281.
Astronomy and Astrophysics
Astronomy
20
Corotation, Interplanetary Medium, Scintillation, Solar Wind, Space Plasmas, Astronomical Maps, Plasma Density, Plasma Oscillations, Sky Surveys (Astronomy)
Scientific paper
A sky survey of interplanetary scintillation has been used to map a major corotating structure which extended to high heliolatitudes during 17 July-5 August 1979. Observations of 900 sources enabled the feature to be tracked for 20 days as it approached and passed over the earth, and its three-dimensional structure was determined by comparing the data with theoretical maps computed for simple models. The main features of the disturbance, including both its shape and development with radial distance, could be explained by a sector of enhanced density followed by a wider sector of below-average density, in accordance with the structure usually associated with a high-speed solar wind stream. The observations and deductions are in broad agreement with spacecraft measurements of the solar plasma near earth, although the high-speed flow was less prominent than expected.
Gapper G. R.
Hewish Antony
Tappin James S.
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