@article{Franci:2022:10.5194/egusphere-egu22-8705,
author = {Franci, L and Papini, E and Micera, A and Matteini, L and Stawarz, J and Lapenta, G and Burgess, D and Hellinger, P and Landi, S and Verdini, A and Montagud-Camps, V},
doi = {10.5194/egusphere-egu22-8705},
title = {Fully kinetic simulations of the near-Sun solar wind plasma: turbulence, reconnection, and particle heating},
url = {http://dx.doi.org/10.5194/egusphere-egu22-8705},
year = {2022}
}

Download

TY  - JOUR
AB  - <jats:p>&lt;p&gt;We model the development of plasma turbulence in the near-Sun solar wind with high-resolution fully-kinetic particle-in-cell (PIC) simulations, initialised with plasma conditions measured by Parker Solar Probe during its first solar encounter (ion and electron plasma beta &amp;#8804; 1 and a large amplitude of the turbulent fluctuations). The power spectra of the plasma and electromagnetic fluctuations are characterized by multiple power-law intervals, with a transition and a considerable steepening in correspondence of the electron scales. In the same range of scales, the kurtosis of the magnetic fluctuations is observed to further increase, hinting at a higher level of intermittency. We observe a number of electron-only reconnection events, which are responsible for an increase of the electron temperature in the direction parallel to the ambient field. The total electron temperature, however, exhibits only a small increase due to the cooling of electrons in the perpendicular direction, leading to a strong temperature anisotropy. We also analyse the power spectra of the different terms of the electric field in the generalised Ohm&amp;#8217;s law, their linear and nonlinear components, and their alignment, to get a deeper insight on the nature of the turbulent cascade. Finally, we compare our results with those from hybrid simulations with the same parameters, as well as with spacecraft observations.&lt;/p&gt;</jats:p>
AU  - Franci,L
AU  - Papini,E
AU  - Micera,A
AU  - Matteini,L
AU  - Stawarz,J
AU  - Lapenta,G
AU  - Burgess,D
AU  - Hellinger,P
AU  - Landi,S
AU  - Verdini,A
AU  - Montagud-Camps,V
DO  - 10.5194/egusphere-egu22-8705
PY  - 2022///
TI  - Fully kinetic simulations of the near-Sun solar wind plasma: turbulence, reconnection, and particle heating
UR  - http://dx.doi.org/10.5194/egusphere-egu22-8705
ER  - 

Download