Numerical Investigation of the Magnetic Topology of Active Region 0069: Case Study for the 2002 August 24 Coronal Mass Ejection

Details Numerical Investigation of the Magnetic Topology of Active Region 0069: Case Study for the 2002 August 24 Coronal Mass Ejection Numerical Investigation of the Magnetic Topology of Active Region 0069: Case Study for the 2002 August 24 Coronal Mass Ejection

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.2912l&link_type=abstract

American Astronomical Society Meeting 210, #29.12; Bulletin of the American Astronomical Society, Vol. 39, p.139

Astronomy and Astrophysics

Astronomy

Scientific paper

The coronal mass ejection (CME) on August 24, 2002 from the western limb of the Sun with a speed of about 1700 km/s was associated with a large solar energetic particle event (the only ground-level enhancement in 2002) and a X3.1 class flare. The ejection originated from NOAA active region 10069, one of the longest-lived active region of solar cycle 23, which produced a series of flares and CMEs in August 2002.
We employed BATS-R-US to perform 3-D MHD numerical investigations of this active region and the August 24 CME using magnetic field observations from MDI. We will discuss the magnetic topology of the active region and its connection to adjacent active regions. A novel way to drive the eruption by stretching and twisting the opposite polarity footprints of a small magnetic dipole along the polarity inversion line will be presented. We will emphasize the importance of the presence of nulls in the underlying magnetic topology of the active region to achieve the loss-of-equilibrium and subsequent eruption. We also compare the simulated dynamics of the CME with related LASCO observations.

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