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Quasi-periodic fast propagating magnetoacoustic waves during the magnetic reconnection between solar coronal loops View all abstracts by submitter

Leping Li   Submitted: 2018-11-21 18:38

Employing Solar Dynamics Observatory/Atmospheric Imaging Assembly (AIA) multi-wavelength im- ages, we have presented coronal condensations caused by magnetic reconnection between a system of open and closed solar coronal loops. In this Letter, we report the quasi-periodic fast magnetoacoustic waves propagating away from the reconnection region upward across the higher-lying open loops dur- ing the reconnection process. On 2012 January 19, reconnection between the higher-lying open loops and lower-lying closed loops took place, and two sets of newly reconnected loops formed. Thereafter, cooling and condensations of coronal plasma occurred in the magnetic dip region of higher-lying open loops. During the reconnection process, disturbances originating from the reconnection region prop- agate upward across the magnetic dip region of higher-lying loops with the mean speed and mean speed amplitude of 200 and 30 km s-1, respectively. The mean speed of the propagating disturbances decreases from ∼230 km s-1 to ∼150 km s-1 during the coronal condensation process, and then in- creases to ∼220 km s-1. This temporal evolution of the mean speed anti-correlates with the light curves of the AIA 131 and 304 Å channels that show the cooling and condensation process of coronal plasma. Furthermore, the propagating disturbances appear quasi-periodically with a peak period of 4 minutes. Our results suggest that the disturbances represent the quasi-periodic fast propagating magnetoacoustic (QFPM) waves originating from the magnetic reconnection between coronal loops.

Authors: Li, L. P., Zhang, J., Peter, H., Chitta, L. P., Su, J. T., Song, H. Q., Xia, C., Hou, Y. J.
Projects: SDO-AIA

Publication Status: accepted for publication in ApJL
Last Modified: 2018-11-22 20:10
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