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Damped large amplitude oscillations in a solar prominence and a bundle of coronal loops

Research in Astronomy and Astrophysics 2016年第11期16卷 19-28页

作者： Quan-Hao Zhang Yu-Ming Wang Rui Liu Cheng-Long Shen Min Zhang Ting-Yu Gou Jia-Jia Liu Kai Liu Zhen-Jun Zhou Shui Wang CAS Key Laboratory of Geospace Environment Department of Geophysics and Planetary Sciences University of Science and Technology of China Hefei 230026 China Synergetic Innovation Center of Quantum Information & Quantum Physics University of Science and Technology of China Hefei 230026 China Collaborative Innovation Center of Astronautical Science and Technology Hefei 230026 China Mengcheng National Geophysical Observatory School of Earth and Space Sciences University of Science and Technology of China Hefei 230026 China Department of Mathematics and Physics Anhui Jianzhu University Hefei 230601 China

We investigate the evolutions of two prominences （P1, P2） and two bundles of coronal loops （L1, L2）, observed with SDO/AIA near the east solar limb on 2012 September 22. It is found that there were large-amplitude oscillations in P1 and L1 but no detectable motions in P2 and L2. These transverse oscillations were triggered by a large-scale coronal wave, originating from a large flare in a remote active region behind the solar limb. By carefully comparing the locations and heights of these oscillating and non-oscillating structures, we conclude that the propagating height of the wave is between 50 Mm and 130 Mm. The wave energy deposited in the oscillating prominence and coronal loops is at least of the order of 10-8 erg. Furthermore, local magnetic field strength and Alfv6n speeds are derived from the oscillating periods and damping time scales, which are extracted from the time series of the oscillations. It is demon- strated that oscillations can be used in not only coronal seismology, but also to reveal the properties of the wave.

关键词： sun: filaments prominences -- sun: flares -- sun: oscillations -- waves

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