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Hot protons in the inner corona and their effect on the flow properties of the solar wind
Habbal, Shadia R.; Hollweg, Joseph V.; Esser, Ruth +1 more
Following recent observations which indicate the presence of extremely high flow speeds in the inner corona, 700-800kms-1 below 10RS, and the possible presence of very high proton temperatures, 3×106<=Tp<=8.5×106K, we present a parameter study which shows that if the high proton temperat…
Influence of heavy ions on the high-speed solar wind
Li, Xing; Habbal, Shadia R.; Esser, Ruth +1 more
We present the results of a parameter study of the influence of heavy ions on the background solar wind, choosing doubly ionized helium, or alpha particles, and O+6, as examples. Using a three-fluid solar wind model, we keep the input parameters to the electrons and protons unchanged and investigate the effects of changing the input ene…
Alfvénic fluctuations in fast and slow solar winds
Orlando, S.; Peres, G.; Rosner, R. +1 more
We compute properties of Alfvénic fluctuations within a wide frequency range (i.e., 10-6s-1<~f<~10-2s-1) in both high- and low-speed magnetized radial solar winds. In particular, the radial and frequency variations of the normalized cross helicity σc, the Alfvén ratio <script>R<…
Solar origin of the 26-day periodicity observed by Ulysses
Weber, M.; Hoeksema, J. T.; Acton, L. W. +1 more
The Ulysses spacecraft discovered that the interplanetary magnetic sector structure went through a major restructuring in mid-1992. The observed recurrence period changed from about 25.4 days to about 26.2 days. Another interesting discovery is that the solar wind speed, energetic particle fluxes, and interplanetary magnetic field all varied quasi…