The Alfvén transition zone observed by the Parker Solar Probe in young solar wind – global properties and model comparisons
Rohit Chhiber,
Francesco Pecora,
Arcadi V Usmanov
et al.
Abstract:The transition from subAlfvénic to superAlfvénic flow in the solar atmosphere is examined by means of Parker Solar Probe (PSP) measurements during solar encounters 8 to 14. Around 220 subAlfvénic periods with a duration ≥ 10 minutes are identified. The distribution of their durations, heliocentric distances, and Alfvén Mach number are analyzed and compared with a global magnetohydrodynamic model of the solar corona and wind, which includes turbulence effects. The results are consistent with a patchy and fragme… Show more
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