12 Appendix A: Some Characteristic Solar Wind Parameters
Although solar wind is a highly variable medium, it is possible to identify some characteristic values for
its most common parameters. Since the wind is an expanding medium, we ought to choose one
heliocentric distance to refer to and, usually, this distance is . In the following we will provide
different tables referring to several solar wind parameters, velocities, characteristic times, and
As it can be seen, the solar wind is a super-Alfvénic, collisionless plasma, and MHD turbulence can be
investigated for frequencies smaller than .