Ulysses Observations of Latitude Gradients in the Heliospheric Magnetic Field: Radial Component and Variances

摘要: The radial component of the magnetic field at Ulysses, over latitudes from −10° to −45° and distances 5.3 3.8 AU, compares very well with corresponding measurements being made by IMP-8 in ecliptic 1AU. There is little, if any, evidence a latitude gradient. Variances field, normalized square magnitude, show little change variations magnitude but large increase transverse variations. latter are shown be caused presence amplitude, long period Alfvenic fluctuations. This identification based on close relation between velocity perturbations including effect anisotropy solar wind pressure. waves propagating outward Sun, as ecliptic, variance analysis indicates that direction propagation rather than field-aligned. A significant long-period > 10 hours present.