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Dynamical features and spatial structures of the plasma interaction region of 67P/Churyumov–Gerasimenko and the solar wind

Koenders, C. and Glassmeier, K.H. and Richter, L. and Ranocha, H. and Motschmann, U. (2015) Dynamical features and spatial structures of the plasma interaction region of 67P/Churyumov–Gerasimenko and the solar wind. Planetary and Space Science, 105, pp. 101-116. Elsevier. DOI: 10.1016/j.pss.2014.11.014 ISSN 0032-0633

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Abstract

In the advent of the Rosetta arrival at the comet 67P/Churyumov–Gerasimenko, we present a global 3D hybrid simulation model of the cometary plasma interaction which resolves the innermost coma sufficiently. As Rosetta will only provide local information, global simulations are required to put these local observations into a wider global perspective. In the selected scenario close to the perihelion, the gas production of the comet is large enough to trigger a cometary bow shock and a small diamagnetic cavity around the nucleus. The simulation reveals the presence of a cometary ionopause and a recombination layer, which is in general agreement with single-fluid MHD simulations. However, we found an asymmetry in the interaction region caused by the pick-up of the cometary ions, which effects all known boundaries. In addition, we study the velocity distributions of the ions and find the presence of three distinct populations of cometary ions at the inner boundaries. The bifurcation created in the ion energy spectrum might be observable by the instruments onboard the Rosetta spacecraft.

Item URL in elib:https://elib.dlr.de/100830/
Document Type:Article
Title:Dynamical features and spatial structures of the plasma interaction region of 67P/Churyumov–Gerasimenko and the solar wind
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Koenders, C.Institut für Geophysik und extraterrestrische Physik,Technische Universität Braunschweig, Mendelssohnstr. 3, 38106 Braunschweig, GermanyUNSPECIFIED
Glassmeier, K.H.Institut für Geophysik und Meteorologie, TU Braunschweig, GermanyUNSPECIFIED
Richter, L.nstitut für Geophysik und Meteorologie, TU Braunschweig, GermanyUNSPECIFIED
Ranocha, H.Institut für Theoretische Physik, Technische Universität Braunschweig, Mendelssohnstr. 3, 38106 Braunschweig, GermanyUNSPECIFIED
Motschmann, U.uwe.motschmann (at) dlr.deUNSPECIFIED
Date:2015
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:105
DOI :10.1016/j.pss.2014.11.014
Page Range:pp. 101-116
Publisher:Elsevier
ISSN:0032-0633
Status:Published
Keywords:Comet Churyumov-Gerasimenko, Rosetta, Plasma interaction, Hybrid simulation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt ROSETTA Instrumente
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Deposited By: Kührt, Dr.rer.nat. Ekkehard
Deposited On:07 Jan 2016 08:05
Last Modified:08 Mar 2018 18:48

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