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2022 
The heliospheric ambipolar potential inferred from sunwardpropagating halo electrons We provide evidence that the sunwardpropagating half of the solar wind electron halo distribution evolves without scattering in the inner heliosphere. We assume the particles conserve their total energy and magnetic moment, and perform a Liouville mapping on electron pitch angle distributions measured by the Parker Solar Probe SPANE instrument. Namely, we show that the distributions are consistent with Liouville s theorem if an appropriate interplanetary potential is chosen. This potential, an outcome of our fitting meth ... Horaites, Konstantinos; Boldyrev, Stanislav; Published by: \mnras Published on: oct YEAR: 2022 DOI: 10.1093/mnras/stac2051 Parker Data Used; plasmas; Solar wind; Physics  Space Physics 
2021 
Plasma dynamics in lowelectronbeta environments Recent in situ measurements by the MMS and Parker Solar Probe missions bring interest to smallscale plasma dynamics (waves, turbulence, magnetic reconnection) in regions where the electron thermal energy is smaller than the magnetic one. Examples of such regions are the Earth s mangetosheath and the vicinity of the solar corona, and they are also encountered in other astrophysical systems. In this brief review, we consider simple physical models describing plasma dynamics in such lowelectronbeta regimes, discuss their con ... Boldyrev, Stanislav; Loureiro, Nuno; Roytershteyn, Vadim; Published by: Frontiers in Astronomy and Space Sciences Published on: 05/2021 YEAR: 2021 DOI: 10.3389/fspas.2021.621040 magnetic fields; Heliosphere; Solar wind; Solar corona; Earth magnetosheath; plasma turbulence; Earth magnetosphere; Collisionless plasma 
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