SH21C-05
Coronal Magnetic Structures for Homologous Eruptions
Tuesday, 15 December 2015: 09:10
2011 (Moscone West)
Jeongwoo Lee1, Chang Liu2, Ju Jing2 and Jongchul Chae3, (1)Seoul National University, Seoul, South Korea, (2)New Jersey Institute of Technology, Newark, NJ, United States, (3)Seoul National University, Department of Physics and Astronomy, Seoul, South Korea
Abstract:
Many studies have been made on homologous eruptions for their importance in understanding the flare energy build-up and release processes. We study the homologous eruptions that occurred in three active regions, NOAA 11444, 11283, and 12192, with emphasis on the coronal quantities derived from the nonlinear force-free field (NLFFF) extrapolation. The quantities include magnetic energy, electric current, and magnetic twist number, and decay index, computed from the high cadence photospheric vector magnetograms of the Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamic Observatory (SDO). In addition, photospheric magnetic flux, flare ribbons and overlying field distribution are also examined to determine the changes associated with each eruption. As main results, we will present the difference between the homology of confined eruptions and that of eruptive ones, and variations of the coronal quantities with flare strength.
