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| Titel |
Rosetta swing-by at Mars – an analysis of the ROMAP measurements in comparison with results of 3-D multi-ion hybrid simulations and MEX/ASPERA-3 data |
| VerfasserIn |
A. Boesswetter, U. Auster, I. Richter, M. Franz, B. Langlais, S. McKenna-Lawlor, S. Simon, U. Motschmann, K. H. Glassmeier, N. J. T. Edberg, R. Lundin |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 27, no. 6 ; Nr. 27, no. 6 (2009-06-08), S.2383-2398 |
| Datensatznummer |
250016552
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| Publikation (Nr.) |
 copernicus.org/angeo-27-2383-2009.pdf |
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| Zusammenfassung |
| The Rosetta spacecraft flew by Mars at a distance of 260 km
on 25 February 2007 during a gravity assist manoeuvre. During the
closest approach (CA) the lander magnetometer ROMAP was switched
on. The dataset taken during this swingby provides insight into the
plasma environment around Mars: in addition to a pronounced bow
shock crossing Rosetta recorded the signature of the pile up region
of draped magnetic field. Also the Rosetta measurements showed
signatures of crustal magnetic field anomalies which can be
verified by results of a crustal magnetic field model.
In order to understand the measured field morphology, multi-ion
hybrid simulations were performed. Some of the input parameters for
the simulations were obtained from Mars Express (MEX) data which
were contemporaneously collected during the Rosetta swingby. These
simulations reproduces ROMAP magnetic field measurements and show
that the interplanetary magnetic field pointed northward during the
encounter. A spectral analysis shows upstream waves ahead of the
bow shock and indicates the presence of the magnetic pile-up
boundary (MPB). The multi-ion model reproduces the ion fluxes
measured by MEX/ASPERA-3 and is in agreement with the measurements
to within one order of magnitude. |
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