Multi-wavelength Observations Of The Evolution Of A Multi-filament Complex
Abstract
The strong and clear association between eruptive filaments and the production of solar flares and CMEs provides a natural starting point from which to explore the connections between solar conditions and eruptive events. The development of the filament in the build up to any eruption is critical to understanding how eruptions occur. We use high cadence ground-based observations from the Mauna Loa Solar Observatory (MLSO), in conjunction with complementary data from SDO, and STEREO to quantify the development of a multipolar magnetic complex comprising several distinct filaments, that formed in a decaying active region group over the course of November/December 2011. Two neighboring filaments in this complex erupt within 6 hours of each other on 2011 December, 25. In this paper we describe the evolution of this complex over the course of its development across the solar disk, as viewed from STEREO A, B and SDO, and discuss the role played by the field development, filament dynamics and twisting motions in forming the filament complex, initiating the eruptions, and controlling the subsequent reformation of the filament channels. The MLSO CHIP instrument, in particular, allows for some measure of Doppler velocity discrimination in the He I line at 10830Å providing a unique diagnostic capability for determining the strength and location of the filament dynamics, particularly the twisting and writhing motions in the erupting filaments. These data are combined with a 3D reconstruction using STEREO EUVI and SDO AIA data to better determine the 3D velocity evolution and spatial distribution of the twist.
- Publication:
-
American Astronomical Society Meeting Abstracts #220
- Pub Date:
- May 2012
- Bibcode:
- 2012AAS...22020107A