On the Variation of Intermittency of Fast and Slow Solar Wind With Radial Distance, Heliospheric Latitude, and Solar Cycle

Intermittency, an important property of astrophysical plasma turbulence, is studied extensively during last decades from in-situ measurements the solar wind and magnetic field in ecliptic plane at higher latitudes, heliocentric distances between 0.3 5 Astronomical Units. In this paper, we review main findings on intermittency derived investigation turbulence for inertial range scales. It turns out that our current knowledge evolution heliosphere based two missions, Helios Ulysses. We discuss importance data selection methodologies applications heliospheric spacecraft, different analysis techniques (the anomalous scaling structure function, non-Gaussianity probability distribution functions, local measure estimated a wavelet representation multifractal spectrum). Studies show Alvénic less intermittent but reveals increase with radial distance. Moreover, stronger than velocity fluctuations considered to be responsible distance anisotropy fluctuations. The fast minimum decreases latitude. Finally, level depends cycle phase, reflecting changes state suggesting deeper study origin slow can further improve understanding intermittency.