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- SH33A-03: Heavy Ion Acceleration at 6 Solar Radii as Observed by Parker Solar Probe
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NOLA CC
Author(s):Generic 'disconnected' Message
Donald Mitchell, Johns Hopkins University Applied Physics Laboratory (First Author)
Samer Alnussirat, University of California, Berkeley
Marc Pulupa, University of California Berkeley
Athanasios Kouloumvakos, The Johns Hopkins University. Applied Physics Laboratory (Presenting Author)
Grant Berland, Johns Hopkins University Applied Physics Laboratory
Ralph McNutt, Johns Hopkins University Applied Physics Laboratory
Edmond Roelof, Johns Hopkins University Applied Physics Laboratory
Matthew Hill, Applied Physics Laboratory Johns Hopkins
David McComas, Princeton University
Christina Cohen, Caltech
Stuart Bale, University of California Berkeley
Davin Larson, Space Sciences Laboratory
Ali Rahmati, University of California Berkeley, Space Sciences Laboratory
Orlando Romeo, University of Maryland, College Park
Near perihelion on 2025 June 18 Parker Solar Probe measured a solar energetic particle (SEP) event for which the location of the acceleration process was found to be at 5 solar radii above the sun's surface (6 solar radii heliocentric distance). Although this would not be remarkable for a coronal mass ejection shock or compression-associated process, this event was quite different in that most of the particles accelerated were minor ions in the solar wind (oxygen, iron) rather than the much more abundant hydrogen and helium that typically dominate SEP events. Most small, transient events rich in minor ions have their sources in the low corona, close to the sun's surface. This event should provide important constraints on the possible acceleration mechanisms based on its high altitude location.
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