Evidence for Collisionless Magnetic Reconnection at Mars

Details Evidence for Collisionless Magnetic Reconnection at Mars Evidence for Collisionless Magnetic Reconnection at Mars

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh42b..06b&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SH42B-06

Astronomy and Astrophysics

Astrophysics

2753 Numerical Modeling, 6225 Mars, 7835 Magnetic Reconnection (2723, 7526)

Scientific paper

Magnetic reconnection is a fundamental plasma process that enables the rapid conversion of magnetic to particle energy and is important in astrophysics as well as solar, space and planetary physics. Using data from the Mars Global Surveyor (MGS) spacecraft in combination with 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 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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