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Hybrid simulations of stellar wind interaction with close-in extrasolar planets

Johansson, E. P. G. and Bagdonat, T. and Motschmann, U. (2010) Hybrid simulations of stellar wind interaction with close-in extrasolar planets. European Astronomical Society Publications Series (EAS), 41, pp. 459-462. EDP Sciences. DOI: 10.1051/eas/1041038 ISSN 1633-4760

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Abstract

A hybrid code has been used for three-dimensional simulations of the stellar wind interaction with the ionosphere of an Earth-sized close-in extrasolar planet. The hybrid code treats electrons as a massless, charge-neutralizing, adiabatic fluid while ions are treated as macroparticles. To study the effects of an expanding ionosphere, a consequence of an expanding atmosphere as for e.g. exoplanet HD 209458 b, we have compared the simulation results for an ordinary stationary ionosphere with the results for an expanding ionosphere. In both cases we can identify bow shock, magnetopause and ion-composition boundary. The expanding ionosphere pushes the bow shock and magnetopause upstream and increases the size of the entire interaction region, creating a large wake behind the planet dominated only by the expanding ionosphere.

Item URL in elib:https://elib.dlr.de/68477/
Document Type:Article
Title:Hybrid simulations of stellar wind interaction with close-in extrasolar planets
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Johansson, E. P. G.Institute for Theoretical Physics, TU Braunschweig, Germany UNSPECIFIED
Bagdonat, T.Institute for Theoretical Physics, TU Braunschweig, Germany UNSPECIFIED
Motschmann, U.uwe.motschmann (at) dlr.deUNSPECIFIED
Date:8 January 2010
Journal or Publication Title:European Astronomical Society Publications Series (EAS)
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:41
DOI :10.1051/eas/1041038
Page Range:pp. 459-462
Publisher:EDP Sciences
Series Name:EAS Publication Series
ISSN:1633-4760
Status:Published
Keywords:hybrid, stellar wind, ionosphere exoplanet HD 209458
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 Extrasolare Planeten (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Brumm, Laura-Maria
Deposited On:18 Jan 2011 09:07
Last Modified:06 Sep 2019 15:29

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