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

被引：7

作者：

Boesswetter, A. ^{[1
]}

Auster, U. ^{[2
]}

Richter, I. ^{[2
]}

Fraenz, M. ^{[4
]}

Langlais, B. ^{[5
]}

McKenna-Lawlor, S. ^{[6
]}

Simon, S. ^{[1
]}

Motschmann, U. ^{[1
,3
]}

Glassmeier, K. H. ^{[2
]}

Edberg, N. J. T. ^{[7
]}

Lundin, R. ^{[8
]}

机构：

[1] TU Braunschweig, Inst Theoret Phys, Braunschweig, Germany

[2] TU Braunschweig, Inst Geophys & Extraterr Phys, Braunschweig, Germany

[3] Inst Planetary Res, DLR, Berlin, Germany

[4] Max Planck Inst Solar Syst Res, Katlenburg Lindau, Germany

[5] Nantes Atlantique Univ, Lab Planetol & Geodynam, CNRS, Nantes, France

[6] Natl Univ Ireland, Space Technol Ltd, Maynooth, Kildare, Ireland

[7] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

[8] Swedish Inst Space Phys, S-98128 Kiruna, Sweden

来源：

ANNALES GEOPHYSICAE | 2009年 / 27卷 / 06期

关键词：

Interplanetary physics; Planetary bow shocks; Magnetospheric physics; Plasma waves and instabilities; Space plasma physics; Kinetic and MHD theory; SOLAR-WIND INTERACTION; MAGNETIC PILEUP BOUNDARY; ION COMPOSITION BOUNDARY; PLASMA ENVIRONMENT; GLOBAL SURVEYOR; BOW SHOCK; PHOBOS OBSERVATIONS; MAG/ER EXPERIMENT; UPSTREAM WAVES; UP BOUNDARY;

D O I：

10.5194/angeo-27-2383-2009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：2383 / 2398

页数：16

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