The large-scale structure of the interplanetary magnetic field between 1 and 0.3 AU during the primary mission of HELIOS 1

Details The large-scale structure of the interplanetary magnetic field between 1 and 0.3 AU during the primary mission of HELIOS 1 The large-scale structure of the interplanetary magnetic field between 1 and 0.3 AU during the primary mission of HELIOS 1

Nov 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.5161m&link_type=abstract

Journal of Geophysical Research, vol. 83, Nov. 1, 1978, p. 5161-5166. Research supported by the Consiglio Nazionale delle Recer

Astronomy and Astrophysics

Astronomy

9

Helios 1, Interplanetary Magnetic Fields, Magnetic Field Configurations, Magnetic Measurement, Spaceborne Astronomy, Astronomical Models, Magnetohydrodynamic Waves, Solar Wind Velocity

Scientific paper

The macroscale and mesoscale structure of the interplanetary magnetic field during the primary mission of Helios 1 is discussed. The radial field component behaves essentially in agreement with Parker's theory. The transverse component shows a larger variability than the radial component; its radial variation is in good agreement with Parker's theory for high speeds, but some deviation is found for low speeds. The radial variation of the field variance is also studied. Its dependence upon the heliocentric distance r is expressed by the law 1/r cubed, which is necessary but not sufficient for Alfven waves. The available data do not allow a unique interpretation of the 1/r cubed dependence. No big differences are observed between low (less than or equal to 500 km/s) and high (greater than or equal to 600 km/s) solar wind velocity regimes.

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