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Coherent magnetic field deflections and proton heating in the near-Sun solar wind

Published on:

24 September 2023

Primary Category:

Space Physics

Paper Authors:

R. Laker,

T. S. Horbury,

L. D. Woodham,

S. D. Bale,

L. Matteini

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Key Details

Measurements reveal a coherent pattern of magnetic deflections in the solar wind near the Sun

Deflections have a consistent orientation and increased proton temperature

Observations match expected signature of interchange reconnection at coronal bright points

Spatial scale of deflections is similar to periodic jetting at base of plumes

Temperature enhancements may arise from an in situ process

AI generated summary

Coherent magnetic field deflections and proton heating in the near-Sun solar wind

This paper reports on measurements from the Parker Solar Probe spacecraft that reveal a coherent, quasi-periodic pattern of magnetic field deflections in the solar wind close to the Sun. The deflections display a consistent orientation and are associated with increases in proton temperature, especially parallel to the magnetic field. The authors argue these observations represent the in situ signature of interchange reconnection occurring at coronal bright points at the base of coronal plumes on the Sun. The spatial scale of the deflections also matches the periodic jetting from bright points. An alternative explanation is that the temperature enhancements arise from an in situ process dependent on magnetic field angle.

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