Journal article
First lunar wake passage of ARTEMIS: Discrimination of wake effects and solar wind fluctuations by 3D hybrid simulations
Planetary and space science, Vol.59(8), pp.661-671
06/2011
DOI: 10.1016/j.pss.2011.01.012
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.
► ARTEMIS flyby from February 13, 2010. ► Hybrid simulation of lunar wake using dynamic real-time input from OMNI data. ► Separation of solar wind and wake related effects. ► Wave propagation calculation shows three MHD modes present in lunar wake.
Details
- Title: Subtitle
- First lunar wake passage of ARTEMIS: Discrimination of wake effects and solar wind fluctuations by 3D hybrid simulations
- Creators
- S Wiehle - Technische Universität BraunschweigF Plaschke - Technische Universität BraunschweigU Motschmann - Technische Universität BraunschweigK.-H Glassmeier - Max Planck SocietyH.U Auster - Technische Universität BraunschweigV Angelopoulos - University of California, Los AngelesJ Mueller - Technische Universität BraunschweigH Kriegel - Technische Universität BraunschweigE Georgescu - Max Planck SocietyJ Halekas - University of California, BerkeleyD.G Sibeck - Goddard Space Flight CenterJ.P McFadden - University of California, Berkeley
- Resource Type
- Journal article
- Publication Details
- Planetary and space science, Vol.59(8), pp.661-671
- DOI
- 10.1016/j.pss.2011.01.012
- ISSN
- 0032-0633
- eISSN
- 1873-5088
- Publisher
- Elsevier Ltd
- Grant note
- name: Deutsche Forschungsgemeinschaft (DFG), award: MO539/17-1; name: DFG, award: number MO539/16-1; name: German Ministerium für Wirtschaft und Technologie and the Deutsches Zentrum für Luft- und Raumfahrt, award: 50OC1001; DOI: 10.13039/100000104, name: NASA, award: NAS5-02099
- Language
- English
- Date published
- 06/2011
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984200036402771
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