Long, DM;
Murphy, P;
Graham, G;
Carley, EP;
Pérez-Suárez, D;
(2017)
A Statistical Analysis of the Solar Phenomena Associated with Global EUV Waves.
Solar Physics
, 292
(12)
10.1007/s11207-017-1206-0.
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Abstract
Solar eruptions are the most spectacular events in our solar system and are associated with many different signatures of energy release including solar flares, coronal mass ejections, global waves, radio emission and accelerated particles. Here, we apply the Coronal Pulse Identification and Tracking Algorithm (CorPITA) to the high-cadence synoptic data provided by the Solar Dynamics Observatory (SDO) to identify and track global waves observed by SDO. 164 of the 362 solar flare events studied (45%) were found to have associated global waves with no waves found for the remaining 198 (55%). A clear linear relationship was found between the median initial velocity and the acceleration of the waves, with faster waves exhibiting a stronger deceleration (consistent with previous results). No clear relationship was found between global waves and type II radio bursts, electrons or protons detected in situ near Earth. While no relationship was found between the wave properties and the associated flare size (with waves produced by flares from B to X-class), more than a quarter of the active regions studied were found to produce more than one wave event. These results suggest that the presence of a global wave in a solar eruption is most likely determined by the structure and connectivity of the erupting active region and the surrounding quiet solar corona rather than by the amount of free energy available within the active region.
| Type: | Article |
|---|---|
| Title: | A Statistical Analysis of the Solar Phenomena Associated with Global EUV Waves |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1007/s11207-017-1206-0 |
| Publisher version: | http://doi.org/10.1007/s11207-017-1206-0 |
| Language: | English |
| Additional information: | Copyright © The Author(s) 2017 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
| Keywords: | Coronal mass ejections, Low coronal signatures, Waves, magnetohydrodynamic Waves, propagation, Waves Shock |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10035236 |
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