Stadelmann, A., Grenfell, J. L., Lammer, H., Motschmann, U.
Previous studies have shown that extrasolar Earth-like planets in close-in habitable zones around M-stars are weakly protected against galactic cosmic rays (GCRs), leading to a strongly increased...
Does magnetospheric protection of M-star planets depend on planetary mass? (2008)
Grenfell, J. L., Patzer, B., Von Paris, Philip, Lammer, H., Stadelmann, A., ...
Energetic electron asymmetries at Mars: ASPERA-3 observations (2008)
Roussos, E., Fraenz, M., Dubinin, E., Martinecz, C., Woch, J., Motschmann, U., ...
Plasma and fields in the wake of Rhea: 3-D hybrid simulation and comparison with Cassini data (2008)
Roussos, E., Müller, J., Simon, S., Bösswetter, A., Motschmann, U., Krupp, N., ...
ROMAP: Rosetta Magnetometer and Plasma Monitor (2007)
Auster, H. U., Apathy, I., Berghofer, G., Remizov, A., Roll, R., Fornacon, K. H., ...
The scientific objectives, design and capabilities of the Rosetta Lander’s ROMAP instrument are presented. ROMAP’s main scientific goals are longterm magnetic field and plasma measurements of the...
ROMAP: Rosetta Magnetometer and Plasma Monitor (2007)
Auster, H.U., Apathy, I., Berghofer, G., Remizov, A., Roll, R., Fornacon, K.H., ...
The scientific objectives, design and capabilities of the Rosetta Lander's ROMAP instrument are presented. ROMAP's main scientific goals are longterm magnetic field and plama measurements of the...
ROMAP: Rosetta Magnetometer and Plasma Monitor (2007)
Auster, H. U., Apathy, I., Berghofer, G., Remizov, A., Roll, R., Fornacon, K. H., ...
Comparison of plasma data from ASPERA-3/Mars-Express with a 3-D hybrid simulation (2007)
Bößwetter, A., Simon, S., Bagdonat, T., Motschmann, U., Fränz, M., Roussos, E., ...
ROMAP: Rosetta magnetometer and plasma monitor (2007)
Auster, H. U., Apathy, I., Berghofer, G., Remizov, A., Roll, R., Fornaçon, K. H., ...
Exoplanetary radio emission under different stellar wind conditions (2007)
Griessmeier, J. M., Preusse, S., Khodachenko, M., Motschmann, U., Mann, G., Rucker, H. O.
Comparison of plasma data from ASPERA-3/Mars-Express with a 3-D hybrid simulation (2007)
Bößwetter, A., Simon, S., Bagdonat, T., Motschmann, U., Fränz, M., Roussos, E., ...
The ELS and IMA sensors of the ASPERA-3 experiment onboard of Mars-Express (MEX) can measure electron as well as ion moments. We compare these measurements for a specific orbit with the simulation...
Aspects of solar wind interaction with Mars: comparison of fluid and hybrid simulations (2007)
Erkaev, N. V., Bößwetter, A., Motschmann, U., Biernat, H. K.
Mars has no global intrinsic magnetic field, and consequently the solar wind plasma interacts directly with the planetary ionosphere. The main factors of this interaction are: thermalization of...
Simon, S., Boesswetter, A., Bagdonat, T., Motschmann, U., Schuele, J.
The interaction between Titan's ionosphere and the Saturnian magnetospheric plasma flow has been studied by means of a three-dimensional (3-D) hybrid simulation code. In the hybrid model, the...
Simon, S., Boesswetter, A., Bagdonat, T., Motschmann, U.
The plasma environments of Mars and Titan have been studied by means of a 3-D hybrid simulation code, treating the electrons as a massless, charge-neutralizing fluid, whereas ion dynamics are covered...
Comparison of plasma data from ASPERA-3/Mars-Express with a 3-D hybrid simulation (2007)
Bößwetter, A., Simon, S., Bagdonat, T., Motschmann, U., Fränz, M., Roussos, E., ...
The ELS and IMA sensors of the ASPERA-3 experiment onboard of Mars-Express (MEX) can measure electron as well as ion moments. We compare these measurements for a specific orbit with the simulation...
Aspects of solar wind interaction with Mars: comparison of fluid and hybrid simulations (2007)
Erkaev, N. V., Bößwetter, A., Motschmann, U., Biernat, H. K.
Mars has no global intrinsic magnetic field, and consequently the solar wind plasma interacts directly with the planetary ionosphere. The main factors of this interaction are: thermalization of...
Simon, S., Boesswetter, A., Bagdonat, T., Motschmann, U., Schuele, J.
The interaction between Titan's ionosphere and the Saturnian magnetospheric plasma flow has been studied by means of a three-dimensional (3-D) hybrid simulation code. In the hybrid model, the...
Simon, S., Boesswetter, A., Bagdonat, T., Motschmann, U.
The plasma environments of Mars and Titan have been studied by means of a 3-D hybrid simulation code, treating the electrons as a massless, charge-neutralizing fluid, whereas ion dynamics are covered...
Plasma Environment of Titan: a 3D Hybrid Simulation Study (2006)
Simon, S., Bößwetter, A., Bagdonat, T., Motschmann, U., Glassmeier, K.H.
Titan possesses a dense atmosphere, consisting mainly of molecular nitrogen. Titan's orbit is located within the Saturnian magnetosphere most of the time, where the corotating plasma flow is...
Plasma wave source location using CLUSTER as a spherical wave telescope (2006)
Constantinescu, O. D., Glassmeier, K. H., Motschmann, U., Treumann, R. A., Fornacon, K. H., Fränz, M.
Plasma wave source location using CLUSTER as a spherical wave telescope (2006)
Constantinescu, O. D., Motschmann, U., Treumann, R. A., Fränz, M.
Plasma environment of Titan: a 3-D hybrid simulation study (2006)
Simon, S., Bößwetter, A., Bagdonat, T., Motschmann, U.
Titan possesses a dense atmosphere, consisting mainly of molecular nitrogen. Titan's orbit is located within the Saturnian magnetosphere most of the time, where the corotating plasma flow is...
Plasma environment of magnetized asteroids: a 3-D hybrid simulation study (2006)
Simon, S., Bagdonat, T., Motschmann, U.
The interaction of a magnetized asteroid with the solar wind is studied by using a three-dimensional hybrid simulation code (fluid electrons, kinetic ions). When the obstacle's intrinsic magnetic...
Plasma environment of Titan: a 3-D hybrid simulation study (2006)
Simon, S., Bößwetter, A., Bagdonat, T., Motschmann, U.
Titan possesses a dense atmosphere, consisting mainly of molecular nitrogen. Titan's orbit is located within the Saturnian magnetosphere most of the time, where the corotating plasma flow is...
Plasma environment of magnetized asteroids: a 3-D hybrid simulation study (2006)
Simon, S., Bagdonat, T., Motschmann, U.
The interaction of a magnetized asteroid with the solar wind is studied by using a three-dimensional hybrid simulation code (fluid electrons, kinetic ions). When the obstacle's intrinsic magnetic...
Pre-Cometary Ice Composition from Hot Core Chemistry (2005)
Tornow, C., Kührt, E., Motschmann, U.
Pre-cometary ice located around star-forming regions contains molecules that are pre-biotic compounds or pre-biotic precursors. Molecular line surveys of hot cores provide information on the...
Low energy electron microsignatures at the orbit of Tethys: Cassini MIMI/LEMMS observations (2005)
Roussos, E., Krupp, N., Woch, J., Lagg, A., Jones, G. H., Paranicas, C., ...
Plasma environment of comet Churyumov-Gerasimenko 3D hybrid code simulations (2004)
Bagdonat, T., Motschmann, U., Kührt, E.
Recent measurements indicate the H2O production rate of comet Churyumov-Gerasimenko to be of the same order as for comet Wirtanen. From a plasma physical point of view, this classifies both comets as...
Narita, Y., Schäfer, S., Motschmann, U., Fränz, M., Dandouras, I., ...
We statistically study various properties of low-frequency waves such as frequencies, wave numbers, phase velocities, and polarization in the plasma rest frame in the terrestrial foreshock. Using...
Plasma boundaries at Mars: a 3-D simulation study (2004)
Bößwetter, A., Bagdonat, T., Motschmann, U., Sauer, K.
The interaction of the solar wind with the ionosphere of planet Mars is studied using a three-dimensional hybrid model. Mars has only a weak intrinsic magnetic field, and consequently its ionosphere...
Plasma boundaries at Mars: a 3-D simulation study (2004)
Bößwetter, A., Bagdonat, T., Motschmann, U., Sauer, K.
The interaction of the solar wind with the ionosphere of planet Mars is studied using a three-dimensional hybrid model. Mars has only a weak intrinsic magnetic field, and consequently its ionosphere...
Narita, Y., Schäfer, S., Motschmann, U., Fränz, M., Dandouras, I., ...
We statistically study various properties of low-frequency waves such as frequencies, wave numbers, phase velocities, and polarization in the plasma rest frame in the terrestrial foreshock. Using...
Narita, Y., Schäfer, S., Motschmann, U., Fränz, M., Dandouras, I., ...
We statistically study various properties of low-frequency waves such as frequencies, wave numbers, phase velocities, and polarization in the plasma rest frame in the terrestrial foreshock. Using...
Narita,Y., Schäfer,S., Motschmann,U., Sauer,K., Balogh,A., ...
Narita, Y., Schäfer, S., Motschmann, U., Sauer, K., Dandouras, I., ...
Cluster provides us with a unique possibility to study ULF waves. We analyze ULF wave activity in the near-Earth upstream solar wind. Using Cluster as a wave telescope we investigate in detail wave...
Numerical parameter studies of ion-thruster-beam neutralization (2003)
Othmer, C., Motschmann, U., Richter, I.
Ion-thruster-beam neutralization is an essential process of the operation of ion engines. By means of a three-dimensional eletromagnetic particle-in-cell simulation, we carry out parameter studies of...
Calibration of flux-gate magnetometers using relative motion (2002)
Auster, H.U., Fornacon, K.H., Georgescu, E., Glassmeier, K.H., Motschmann, U.
A simple analytical mmodel for the calibration of a flux-gate magnetometer using relative sensor motion in a constant magnitude magnetic field (B) is presented. Sensor motion is parametrized in terms...
3D hybrid simulation code using curvilinear coordinates (2002)
A new simulation code using the hybrid approximation for modeling extraterrestial plasma processes is described, which can be used in arbitrary three-dimensional, ordered, hexahedral grid. Maxwell's...
From a weak to a strong comet - 3D global hybrid simulation studies (2002)
Plasma structures resluting from the solar wind interaction with weak comets are discussed. Numerical simulations using a newly developed hybrid code are presented. The simulations are primarily...
Othmer, C., Motschmann, U., Glassmeier, K.H.
Charge-conserving local field solvers are widely used in today's electromagnetic plasma simulations. As in such codes the charge does not appear explicitly, the injection of new particles into the...
3D hybrid simulations of the interaction of the solar wind with a weak comet (2002)
Lipatov, A. S., Motschmann, U., Bagdonat, T.
The interaction of the solar wind with weak comets, leading to the formation of the cometary magnetosphere with different types of structures in the solar wind and heavy ion plasmas, is simulated...
Numerical simulation of ion thruster-induced plasma dynamics - the model and initial results (2002)
Othmer, C., Glassmeier, K.H., Motschmann, U., Schüle, J., Frick, Ch.
Calibration of flux-gate magnetometers using relative motion (2002)
Auster, H. U., Kornacon, K. H., Georgescu, E., Glassmeier, K. H., Motschmann, U.
Numerical simulations on shock-like ion thruster neutralization (2001)
Othmer, C., Glassmeier, K. H., Motschmann, U., Schüle, J., Frick, Ch.
Cluster as a wave telescope ? first results from the fluxgate magnetometer (2001)
Motschmann, U., Dunlop, M., Balogh, A., Acuña, M. H., Carr, C., ...
The four Cluster spacecraft provide an excellent opportunity to study spatial structures in the magnetosphere and adjacent regions. Propagating waves are amongst the interesting structures and for...
Cluster as a wave telescope ? first results from the fluxgate magnetometer (2001)
Motschmann, U., Dunlop, M., Balogh, A., Acuña, M. H., Carr, C., ...
The four Cluster spacecraft provide an excellent opportunity to study spatial structures in the magnetosphere and adjacent regions. Propagating waves are amongst the interesting structures and for...
Three-dimensional simulations of ion thruster beam neutralization (2000)
Othmer, C., Glassmeier, K.H., Motschmann, U., Schüle, J., Frick, Ch.
Physics and mass loaded plasmas. (2000)
Szegö, K., Bingham, R., Bogdanov, A., Fischer, C., Haerendel, G., ...
Physics of mass loaded plasmas (2000)
Szego, K, Glassmeier, KH, Bingham, R, Bogdanov, A, Fischer, C, Haerendel, G, ...
On the dispersion of two coexisting nongyrotropic ion species (1999)
Brinca, A. L., Motschmann, U., Romeiras, F. J.
Space observations in the solar wind and simulations of high Mach number bow-shocks have detected particle populations with two coexisting nongyrotropic ion species. We investigate the influence of...
A mode filter for plasma waves in the Hall-MHD approximation (1999)
A filter method is presented which allows a qualitative and quantitative identification of wave modes observed with plasma experiments on satellites. Hitherto existing mode filters are based on the...
Nongyrotropic particle distributions in space plasmas (1999)
Motschmann, U., Glassmeier, K. H., Brinca, A. L.
In nonstationary, strong inhomogeneous or open plasmas particle orbits are rather complicated. If the nonstationary time scale is smaller than the gyration period, if the inhomogeneity scale is...
Buchert, S., Motschmann, U., Korth, A., Pedersen, A.
Giant pulsations are nearly monochromatic ULF-pulsations of the Earth's magnetic field with periods of about 100 s and amplitudes of up to 40 nT. For one such event ground-magnetic observations as...
On the dispersion of two coexisting nongyrotropic ion species (1999)
Brinca, A. L., Motschmann, U., Romeiras, F. J.
Space observations in the solar wind and simulations of high Mach number bow-shocks have detected particle populations with two coexisting nongyrotropic ion species. We investigate the influence of...
A mode filter for plasma waves in the Hall-MHD approximation (1999)
A filter method is presented which allows a qualitative and quantitative identification of wave modes observed with plasma experiments on satellites. Hitherto existing mode filters are based on the...
Nongyrotropic particle distributions in space plasmas (1999)
Motschmann, U., Glassmeier, K. H., Brinca, A. L.
In nonstationary, strong inhomogeneous or open plasmas particle orbits are rather complicated. If the nonstationary time scale is smaller than the gyration period, if the inhomogeneity scale is...
Buchert, S., Motschmann, U., Korth, A., Pedersen, A.
Giant pulsations are nearly monochromatic ULF-pulsations of the Earth's magnetic field with periods of about 100 s and amplitudes of up to 40 nT. For one such event ground-magnetic observations as...
At plasma boundaries particle orbits are rather complicated. In particular this is true for a shared magnetic field configuration, that is at reconnection boundaries. In a modified way we rederive...
Nongyrotropy in magnetoplasmas: simulation of wave excitation and phase space diffusion (1997)
Motschmann, U., Kafemann, H.(1), Scholer, M.(2)
Nongyrotropic (gyrophase bunched) ion distributions in a magnetoplasma are studied by analytical methods and by 2-dimensional hybrid code simulations. Nongyrotropy may not occur in a plasma being...
Nongyrotropy in magnetoplasmas: simulation of wave excitation and phase-space diffusion (1997)
Motschmann, U., Kafemann, H., Scholer, M.
Nongyrotropic (gyrophase bunched) ion distributions in a magnetoplasma are studied by analytical methods and by two-dimensional hybrid code simulations. Nongyrotropy may not occur in a plasma being...
Nongyrotropy in magnetoplasmas: simulation of wave excitation and phase-space diffusion (1997)
Motschmann, U., Kafemann, H., Scholer, M.
Nongyrotropic (gyrophase bunched) ion distributions in a magnetoplasma are studied by analytical methods and by two-dimensional hybrid code simulations. Nongyrotropy may not occur in a plasma being...
The Question on an internal Martian Magnetic Field (1991)
Möhlmann, D., Riedler, W., Rustenbach, J., Schwingenschuh, K., Kuhrts, J., Motschmann, U., ...
Geophys Res Phillips, S. W. Barabash, I. Liede, H. Koskinen, First Measurements, J. M. Grebowsky, ...
12.26> Nature, 341, 604-607, 1989. Russell, C. T., Magnetic Flux Ropes in the Ionosphere of Venus, in Physics of Magnetic Flux Ropes: Geophysical Monograph 58, edited by C. T. Russell, E. R....