Evidence for collisionless magnetic reconnection at Mars

Details Evidence for collisionless magnetic reconnection at Mars Evidence for collisionless magnetic reconnection at Mars

Jan 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3502106e&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 2, CiteID L02106

Physics

Plasma Physics

13

Space Plasma Physics: Magnetic Reconnection (2723, 7526), Planetary Sciences: Solar System Objects: Mars, Magnetospheric Physics: Numerical Modeling, Space Plasma Physics: Transport Processes

Scientific paper

Using data from Mars Global Surveyor (MGS) in combination with Particle-In-Cell (PIC) simulations of reconnection, we present the first direct evidence of collisionless magnetic reconnection at Mars. The evidence indicates that the spacecraft passed through the diffusion region where reconnection is initiated and observed the magnetic field signatures of differential electron and ion motion - the Hall magnetic field - that uniquely indicate the reconnection process. These are the first such in-situ reconnection observations at an astronomical body other than the Earth. Reconnection may be the source of Mars' recently discovered auroral activity and the changing boundaries of the closed regions of crustal magnetic field.

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