Magnetic File Rotations in Saturn's Magnetosphere

Details Magnetic File Rotations in Saturn's Magnetosphere Magnetic File Rotations in Saturn's Magnetosphere

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.3710m&link_type=abstract

American Astronomical Society, DPS meeting #39, #37.10; Bulletin of the American Astronomical Society, Vol. 39, p.488

Astronomy and Astrophysics

Astronomy

Scientific paper

As the Pioneer 11 spacecraft passed through the dawn side magnetosphere of Saturn a large-scale rotation of the magnetic field was observed. This rotation was found near the magnetopause and indicates large scale vorticity in Saturn's morning magnetosphere. Magnetohydrodynamic simulations of the interaction between Saturn's magnetosphere and the solar wind also show large scale vortices in the morning magnetosphere [Fukazawa et al., Geophys. Res. Lett., 34, L01105, doi:10.1029/2006GL028373]. In this study we are using Cassini magnetic field observations to determine how common this rotation is and what it implies for convection in Saturn's magnetosphere. In order to carry out this study we first needed to determine when Cassini was within the magnetosphere and developed an automated system to determine magnetopause and bow shock crossings. Finally we developed an automated system to determine the transverse perturbations in the magnetic field and plot them on the Cassini trajectory. The results of our survey of Cassini data will be compared with the simulation results. This work is funded by NASA's Planetary Data System (PDS) College Student Investigator (CSI) program.

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