Bulletin of the American Physical Society
60th Annual Meeting of the APS Division of Plasma Physics
Volume 63, Number 11
Monday–Friday, November 5–9, 2018; Portland, Oregon
Session JM10: Mini-Conference on Nonlinear Waves and Processes in Space Plasmas I
2:00 PM–4:51 PM,
Tuesday, November 6, 2018
OCC
Room: C124
Chair: David Knudsen, University of Calgary
Abstract ID: BAPS.2018.DPP.JM10.3
Abstract: JM10.00003 : Inertial Kinetic-Alfven Turbulence in a Space Plasma*
2:38 PM–2:57 PM
Presenter:
Stanislav Boldyrev
(Univ of Wisconsin, Madison)
Authors:
Stanislav Boldyrev
(Univ of Wisconsin, Madison)
Vadim Roytershteyn
(Space Science Institute)
Christopher H. K. Chen
(Queen Mary Univ London)
Observations and analytical models indicate that the electron plasma beta parameter (ratio of the thermal to magnetic energy) becomes relatively small at low heliospheric distances, in the regions close to the solar corona, βe << βi ≤ 1. In such a regime, which is also encountered in the Earth’s magnetosheath and other astrophysical systems, kinetic-scale turbulence may be governed by the so-called inertial kinetic-Alfven modes [1,2]. We discuss the properties of this new regime of nonlinear plasma dynamics, present a phenomenological model of inertial kinetic-Alfven turbulence, and demonstrate that the results are in good agreement with the recent kinetic numerical simulations [3].
[1] Chen, C. H. K. & Boldyrev, S. Astrophys. J. 842 (2017) 122;
[2] Passot, T., Sulem, P. L., Tassi, E., Phys. Plasmas 25 (2018) 045107;
[3] Roytershteyn, V., Boldyrev, S., Delzanno, G. L., Chen, C. H. K., Grošelj, D., and Loureiro, N. F., Astrophys. J., 2018 (submitted).
*SB was partly supported by the NSF grant No. PHY-1707272, NASA grant No. 80NSSC18K0646 and by the Vilas Associates Award from the University of Wisconsin - Madison. VR was partly supported by NASA grant NNX15AR16G. CHKC was supported by STFC Ernest Rutherford Fellowship.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DPP.JM10.3
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