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First lunar wake passage of ARTEMIS: Discrimination of wake effects and solar wind fluctuations by 3D hybrid simulations

Wiehle, S. and Plaschke, F. and Motschmann, U. and Glassmeier, K.-H. and Auster, H. U. and Angelopoulos, V. and Mueller, J. and Kriegel, H. and Georgescu, E. and Halekas, J. and Sibeck, D. G. and McFadden, J. P. (2011) First lunar wake passage of ARTEMIS: Discrimination of wake effects and solar wind fluctuations by 3D hybrid simulations. Planetary and Space Science (59), pp. 661-671. Elsevier. DOI: 10.1016/j.pss.2011.01.012. ISSN 0032-0633.

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Abstract

The spacecraft P1 of the new ARTEMIS (Acceleration, Reconnection, Turbulence, and Electrodynamics of the Moon’s Interaction with the Sun) mission passed the lunar wake for the first time on February 13, 2010. We present magnetic field and plasma data of this event and results of 3D hybrid simulations. As the solar wind magnetic field was highly dynamic during the passage, a simulation with stationary solar wind input cannot distinguish whether distortions were caused by these solar wind variations or by the lunar wake; therefore, a dynamic real-time simulation of the flyby has been performed. The input values of this simulation are taken from NASA OMNI data and adapted to the P1 data, resulting in a good agreement between simulation and measurements. Combined with the stationary simulation showing non-transient lunar wake structures, a separation of solar wind and wake effects is achieved. An anisotropy in the magnitude of the plasma bulk flow velocity caused by a non-vanishing magnetic field component parallel to the solar wind flow and perturbations created by counterstreaming ions in the lunar wake are observed in data and simulations. The simulations help to interpret the data granting us the opportunity to examine the entire lunar plasma environment and, thus, extending the possibilities of measurements alone: A comparison of a simulation cross section to theoretical predictions of MHD wave propagation shows that all three basic MHD modes are present in the lunar wake and that their expansion governs the lunar wake refilling process.

Document Type:Article
Title:First lunar wake passage of ARTEMIS: Discrimination of wake effects and solar wind fluctuations by 3D hybrid simulations
Authors:
AuthorsInstitution or Email of Authors
Wiehle, S. Institut für Theoretische Physik der Technischen Universität Braunschweig, Mendelssohnstrasse 3, 38106 Braunschweig, Germany
Plaschke, F.Institut für Geophysik und extraterrestrische Physik der Technischen Universität Braunschweig, Mendelssohnstrasse 3, 38106 Braunschweig, Germany
Motschmann, U.Institut für Theoretische Physik der Technischen Universität Braunschweig, Mendelssohnstrasse 3, 38106 Braunschweig, Germany; uwe.motschmann@dlr.de
Glassmeier, K.-H.Institut für Geophysik und extraterrestrische Physik der Technischen Universität Braunschweig, Mendelssohnstrasse 3, 38106 Braunschweig, Germany;Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany
Auster, H. U.Institut für Geophysik und extraterrestrische Physik der Technischen Universität Braunschweig, Mendelssohnstrasse 3, 38106 Braunschweig, Germany
Angelopoulos, V.Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA, USA
Mueller, J.Institut für Theoretische Physik der Technischen Universität Braunschweig, Mendelssohnstrasse 3, 38106 Braunschweig, Germany
Kriegel, H.Institut für Theoretische Physik der Technischen Universität Braunschweig, Mendelssohnstrasse 3, 38106 Braunschweig, Germany
Georgescu, E.Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany
Halekas, J.Space Sciences Laboratory, University of California, Berkeley, CA, USA
Sibeck, D. G.NASA Goddard Space Flight Center, Greenbelt, MD, USA
McFadden, J. P.Space Sciences Laboratory, University of California, Berkeley, CA, USA
Date:2011
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.1016/j.pss.2011.01.012
Page Range:pp. 661-671
Publisher:Elsevier
ISSN:0032-0633
Status:Published
Keywords:Moon Lunar wake ARTEMIS Hybrid simulation
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben Planetenforschung (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Deposited By: Laura-Maria Brumm
Deposited On:20 Jun 2011 11:35
Last Modified:26 Mar 2013 13:29

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