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Science 19 May 1995:
Vol. 268. no. 5213, pp. 1007 - 1010
DOI: 10.1126/science.268.5213.1007
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Articles

The Heliospheric Magnetic Field Over the South Polar Region of the Sun

A. Balogh 1, D. J. Southwood 1, R. J. Forsyth 1, T. S. Horbury 1, E. J. Smith 2, and B. T. Tsurutani 2

1 Blackett Laboratory, Imperial College, London SW7 2BZ, United Kingdom
2 Jet Propulsion Laboratory, Pasadena, CA 91109-8099, USA.

Magnetic field measurements from the Ulysses space mission overthe south polar regions of the sun showed that the structure and properties of the three-dimensional heliosphere were determined by the fast solar wind flow and magnetic fields from the large coronal holes in the polar regions of the sun. This conclusion applies at the current, minimum phase of the 11-year solar activity cycle. Unexpectedly, the radial component of the magnetic field was independent of latitude. The high-latitude magnetic field deviated significantly from the expected Parker geometry, probably because of large amplitude transverse fluctuations. Low-frequency fluctuations had a high level of variance. The rate of occurrence of discontinuities also increased significantly at high latitudes.

Submitted on February 10, 1995
Accepted on April 17, 1995


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Ulysses above the sun's south pole: an introduction.
E. Smith, R. Marsden, and D. Page (1995)
Science 268, 1005-1007
   Abstract »    PDF »
Over the southern solar pole: low-energy interplanetary charged particles.
L. Lanzerotti, T. Armstrong, R. Gold, C. Maclennan, E. Roelof, G. Simnett, D. Thomson, K. Anderson, S. Hawkins 3rd, S. Krimigis, et al. (1995)
Science 268, 1010-1013
   Abstract »    PDF »
Cosmic Ray and Solar Particle Investigations Over the South Polar Regions of the Sun.
J. A. Simpson, J. J. Connell, C. Lopate, R. B. McKibben, M. Zhang, J. D. Anglin, P. Ferrando, C. Rastoin, A. Raviart, B. Heber, et al. (1995)
Science 268, 1019-1023
   Abstract »    PDF »


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