Animations of Martian Field Line Configuration and Implications for Particle Deposition and Escape

Details Animations of Martian Field Line Configuration and Implications for Particle Deposition and Escape Animations of Martian Field Line Configuration and Implications for Particle Deposition and Escape

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufm.p42a0534b&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #P42A-0534

Physics

5421 Interactions With Particles And Fields, 5440 Magnetic Fields And Magnetism, 6225 Mars

Scientific paper

The configuration of magnetic field lines near Mars is influenced by the crust and the solar wind, and is an important component in our understanding of charged particle motion and the shape of the Martian obstacle to the solar wind. We have created a model for magnetic topology at Mars that is simple to use and compares well to Mars Global Surveyor (MGS) magnetometer (MAG) data. This model is a linear superposition of previously existing magnetic field models for the solar wind and the Martian crust. Multiple crustal models (e.g. Purucker et al., 2000) and solar wind models (e.g. Spreiter and Stahara, ) were evaluated individually to determine where they best describe MGS observations. The resulting superposition model can be used to estimate the Martian magnetic field configuration as a function of solar wind field strength and orientation, and planetary position. We will show animations of the field line configuration as Mars rotates. Next we will focus on one of several implications of the interaction of crustal magnetic sources with the solar wind that can be explored using our superposition model. Field line reconnection is examined by studying the location and fraction of crustal field lines that connect to the solar wind for a variety of solar wind configurations and planetary orientations. Field lines that are open to the solar wind provide possible conduits for particle deposition and particle escape from the Martian atmosphere.

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