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Journal Articles The Astrophysical Journal Supplement Year : 2020

Observations of Heating along Intermittent Structures in the Inner Heliosphere from PSP Data

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K. Goetz
Marc Pulupa
M. Stevens
P. Whittlesey
D. Larson
R. Livi

Abstract

The solar wind proton temperature at 1 au has been found to be correlated with small-scale intermittent magnetic structures, i.e., regions with enhanced temperature are associated with coherent structures, such as current sheets. Using Parker Solar Probe data from the first encounter, we study this association using measurements of the radial proton temperature, employing the partial variance of increments (PVI) technique to identify intermittent magnetic structures. We observe that the probability density functions of high PVI events have higher median temperatures than those with lower PVI. The regions in space where PVI peaks were also locations that had enhanced temperatures when compared with similar regions, suggesting a heating mechanism in the young solar wind that is associated with intermittency developed by a nonlinear turbulent cascade in the immediate vicinity.
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Dates and versions

insu-02942198 , version 1 (18-09-2020)

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R.A. Qudsi, B. A. Maruca, W.H. Matthaeus, T. N. Parashar, Riddhi Bandyopadhyay, et al.. Observations of Heating along Intermittent Structures in the Inner Heliosphere from PSP Data. The Astrophysical Journal Supplement, 2020, 246 (2), pp.46. ⟨10.3847/1538-4365/ab5c19⟩. ⟨insu-02942198⟩
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