Relationship between increasing CME velocity at the initial stage of motion and change in magnetic conditions in the mass ejection generating area
The paper is controversial since it is based on assumptions that require serious experimental con-firmation. An attempt has been made to relate an in-crease in the coronal mass ejection (CME) velocity at the initial stage of its motion with a decrease in the free magnetic energy Efree in the active...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
INFRA-M
2025-06-01
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| Series: | Solar-Terrestrial Physics |
| Subjects: | |
| Online Access: | http://doi.org/10.12737/stp-112202501 |
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| Summary: | The paper is controversial since it is based on assumptions that require serious experimental con-firmation. An attempt has been made to relate an in-crease in the coronal mass ejection (CME) velocity at the initial stage of its motion with a decrease in the free magnetic energy Efree in the active region. In addition, we have examined how magnetic helicity Mh changes in the active region during the selected event. We have analyzed the motion of relatively energetic halo-type CME (the CME kinetic energy is 5.2•1031 erg) recorded on November 26, 2011 and linked to a C1.2 X-ray flare. It has been shown that when Efree increases with time and decreases with rising CME velocity the magnetic helicity varies in the same way: with increasing Efree, Mh intensifies and vice versa. For comparison, we show Efree and Mh variations during the event related to an X3.1 X-ray flare and unrelated to CME. It turned out that in this case Mh intensifies during the strongest decrease in Efree. |
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| ISSN: | 2500-0535 |