Investigating the periodicity of sawtooth events using the Space Weather Modeling Framework (SWMF) - preliminary results

Details Investigating the periodicity of sawtooth events using the Space Weather Modeling Framework (SWMF) - preliminary results Investigating the periodicity of sawtooth events using the Space Weather Modeling Framework (SWMF) - preliminary results

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm32a..06c&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SM32A-06

Physics

2134 Interplanetary Magnetic Fields, 2164 Solar Wind Plasma, 2723 Magnetic Reconnection (7526, 7835), 2740 Magnetospheric Configuration And Dynamics, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

By introducing a non-gyrotropic correction to the induction equation in a BATS-R-US simulation, it has been reported that periodic dipolarizations similar to sawtooth oscillations are seen at geosynchronous orbit in the magnetosphere. However the simulated periodicity reported is around 60 minutes, while the observed periodicity, obtained from a analysis of around 400 individual teeth, is about 180 minutes. We report here preliminary results from an investigation that examines how solar wind parameters may affect the periodicity using a series of Space Weather Modeling Framework (SWMF) simulations which includes the non-gyrotropic BATS-R-US model. We examine the effects of the external driving conditions by systematically changing the magnitude of solar wind dynamic pressure and interplanetary magnetic field (IMF) southward component (Bz) in the simulations.

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