In-situ observation of Hall Magnetohydrodynamic Cascade in Space Plasma
Space Physics
2020-07-01 v2 Plasma Physics
Abstract
We present estimates of the turbulent energy cascade rate, derived from a Hall-MHD third-order law. We compute the contribution from the Hall term and the MHD term to the energy flux. We use MMS data accumulated in the magnetosheath and the solar wind, and compare the results with previously established simulation results. We find that in observation, the MHD contribution is dominant at inertial scales, as in the simulations, but the Hall term becomes significant in observations at larger scales than in the simulations. Possible reasons are offered for this unanticipated result.
Cite
@article{arxiv.1907.06802,
title = {In-situ observation of Hall Magnetohydrodynamic Cascade in Space Plasma},
author = {Riddhi Bandyopadhyay and Luca Sorriso-Valvo and Alexandros Chasapis and Petr Hellinger and William H. Matthaeus and Andrea Verdini and Simone Landi and Luca Franci and Lorenzo Matteini and Barbara L. Giles and Daniel J. Gershman Craig J. Pollock and Christopher T. Russell and Robert J. Strangeway and Roy B. Torbert and Thomas E. Moore and James L. Burch},
journal= {arXiv preprint arXiv:1907.06802},
year = {2020}
}
Comments
Accepted for Publication in Physical Review Letters