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Ye, Y., Korsos, M.B. and Erdelyi, R. (Submitted: 2018) Detailed analysis of dynamic evolution of three Active Regions before flare and CME occurrence at the photospheric level. [Preprint - arXiv] (Submitted)
Abstract
We present a combined analysis of the applications of the weighted horizontal magnetic gradient (denoted as WG_M in Korsos et al., ApJ, 802, L21, 2015) method and the magnetic helicity tool (Berger & Field, JFM, 147, 133, 1984) employed for three active regions (ARs), namely NOAA AR11261, AR11283 and AR11429. All three active regions produced series flares and CMEs. We followed the evolution of the components of the WG_M and the magnetic helicity before the flare and CME occurrences. We found an unique and mutually shared behavior, called the U-shaped pattern, of the weighted distance component of WG_M and of the shearing component of the helicity flux before the flare and CME eruptions. This common pattern is associated with the decreasing-receding phase yet reported only known to be a necessary feature prior to solar flare eruption(s), but found now at the same time in the evolution of the shearing helicity parameter. This result leads to the conclusion that (i) the shearing motion of photospheric magnetic field may be a key driver for the solar eruption in addition to the flux emerging process, and that (ii) the found decreasing-approaching pattern in the evolution of shearing helicity may be another precursor indicator for improving the forecasting of solar eruptions.
Metadata
Item Type: | Preprint |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 The Author(s). For reuse permissions, please contact the Author(s). |
Keywords: | AR; Flare; CME; Precursor parameters |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield) |
Funding Information: | Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL ST/M000826/1 THE ROYAL SOCIETY IE141493 ROYAL SOCIETY IE161153 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 12 Jan 2018 14:29 |
Last Modified: | 12 Jul 2024 10:16 |
Status: | Submitted |
Identification Number: | 10.48550/arXiv.1801.00430 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:125873 |
Available Versions of this Item
- Detailed analysis of dynamic evolution of three Active Regions before flare and CME occurrence at the photospheric level. (deposited 12 Jan 2018 14:29) [Currently Displayed]