Equatorwards Expansion of Unperturbed, High-Latitude Fast Solar Wind
Breen, A. R.; Bisi, M. M.; Fallows, R. A.; Dorrian, G. D.
Greece, United Kingdom, Netherlands
Abstract
We use dual-site radio observations of interplanetary scintillation (IPS) with extremely long baselines (ELB) to examine meridional flow characteristics of the ambient fast solar wind at plane-of-sky heliocentric distances of 24 - 85 solar radii (R⊙). Our results demonstrate an equatorwards deviation of 3 - 4∘ in the bulk fast solar wind flow direction over both northern and southern solar hemispheres during different times in the declining phase of Solar Cycle 23.