Corrections to the azimuthal component of the interplanetary magnetic field due to meridional flow in the solar wind

Astronomy and Astrophysics – Astrophysics

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Azimuth, Interplanetary Magnetic Fields, Meridional Flow, Solar Wind, Stellar Winds, Astronomical Models, Asymptotic Methods, Data Reduction, Graphs (Charts), Interplanetary Medium, Magnetic Flux, Magnetohydrodynamic Waves, Momentum, Pioneer 10 Space Probe, Stellar Rotation, Two Dimensional Models

Scientific paper

Stellar-wind models which incorporate meridional flows tend to open magnetic flux tubes in the equatorial plane of the star. Transport of the magnetic field to higher latitudes is accompanied by an increase in the azimuthal velocity, which increases the corotation of the plasma at all latitudes. The percentage correction to the azimuthal magnetic field compared to classical models is a 10 to 20 percent effect at 5 AU and an angle of 90 deg, whereas the azimuthal velocity correction is a 20 to 40 percent effect. The model is compared with recent observations from Pioneer 10 which may indicate that the azimuthal magnetic field is not as large near Jupiter as suggested by classical two-dimensional models.

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