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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2008, Volume 87, Issue 11, Pages 691–697
(Mi jetpl125)
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This article is cited in 68 scientific papers (total in 68 papers)
GRAVITY, ASTROPHYSICS
High kinetic energy jets in the Earth's magnetosheath: Implications for plasma dynamics and anomalous transport
S. Savina, E. Amatab, L. M. Zelenyia, V. Budaevc, G. Consolinib, R. Treumannd, E. Luceke, J. Safrankovaf, Z. Nemecekf, Y. Khotyaintsevg, M. Andreg, J. Buechnerh, H. Alleynei, P. Songj, J. Bleckik, J. L. Rauchl, S. Romanova, S. Klimova, A. Skalskya a Space Research Institute, Russian Academy of Sciences, Moscow, 117997, Russia
b Istituto Nazionale di Astrofisica — Istituto di Fisica dello Spazio Interplanetario, 00133 Roma, Italy
c Nuclear Fusion Institute, RRC Kurchatov Institute, 123182 Moscow,
Russia
d Munich University, Munich, 80539, Germany
e The Blackett Laboratory, Imperial College London, London, SW7 2AZ, UK
f Charles University, 116 36 Praha 1, Czech Republic
g Swedish Institute of Space Physics, SE-751 21 Uppsala, Sweden
h Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany
i University of Sheffield, Sheffield, S10 2TN, UK
j University of Massachusetts, Lowell MA 01854, USA
k Space Research Center, Polish Academy of Sciences, 00716 Warsaw, Poland
l Laboratoire de Physique et Chimie de l'Environnement, F-45071 Orleans, France
Abstract:
High kinetic energy density jets in the magnetosheath near the Earth magnetopause were observed by Interball-1 [1]. In this paper we continue the investigation of this important physical phenomenon. New data provided by Cluster show that the magnetosheath kinetic energy density during more than one hour exhibits an average level and a series of peaks far exceeding the kinetic energy density in the undisturbed solar wind. This is a surprising finding because in equilibrium the kinetic energy of upstream solar wind should be significantly diminished downstream in the magnetosheath due to plasma braking and thermalization at the bow shock. We suggest to resolve the energy conservation problem by the fact that the non-equilibrium jets appear to be locally superimposed on the background equilibrium magnetosheath, and thus the energy balance should be settled globally on the spatial scales of the entire dayside magnetosheath. We show that both the Cluster and Interball jets are accompanied by plasma super-diffusion and suggest that they are important for energy dissipation and plasma transport. The character of the jet- related turbulence strongly differs from that of known standard cascade models. We infer that these jets may represent the phenomenon of general physical occurrence observed in other natural systems, like heliosphere, astrophysical and fusion plasmas [2 – 10].
Received: 10.04.2008 Revised: 29.04.2008
Citation:
S. Savin, E. Amata, L. M. Zelenyi, V. Budaev, G. Consolini, R. Treumann, E. Lucek, J. Safrankova, Z. Nemecek, Y. Khotyaintsev, M. Andre, J. Buechner, H. Alleyne, P. Song, J. Blecki, J. L. Rauch, S. Romanov, S. Klimov, A. Skalsky, “High kinetic energy jets in the Earth's magnetosheath: Implications for plasma dynamics and anomalous transport”, Pis'ma v Zh. Èksper. Teoret. Fiz., 87:11 (2008), 691–697; JETP Letters, 87:11 (2008), 593–599
Linking options:
https://www.mathnet.ru/eng/jetpl125 https://www.mathnet.ru/eng/jetpl/v87/i11/p691
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