E-Print Archive

There are 4490 abstracts currently viewable.


Search:

Advanced Search
Options
Main Page Add New E-Print Submitter
Information
Feedback
News Help/FAQ About Preferences
Manage Key Phrase
Notification
The role of non-axisymmetry of magnetic flux rope in constraining solar eruptions  

Mingde Ding   Submitted: 2021-05-15 06:01

Whether a solar eruption is successful or failed depends on the competition between different components of the Lorentz force exerting on the flux rope that drives the eruption. The present models only consider the strapping force generated by the background magnetic field perpendicular to the flux rope and the tension force generated by the field along the flux rope. Using the observed magnetic field on the photosphere as a time-matching bottom boundary, we perform a data-driven magnetohydrodynamic simulation for the 30 January 2015 confined eruption and successfully reproduce the observed solar flare without a coronal mass ejection. Here we show a Lorentz force component, resulting from the radial magnetic field or the non-axisymmetry of the flux rope, which can essentially constrain the eruption. Our finding contributes to the solar eruption model and presents the necessity of considering the topological structure of a flux rope when studying its eruption behaviour.

Authors: Ze Zhong, Yang Guo, M. D. Ding
Projects: None

Publication Status: Published in Nature Communications
Last Modified: 2021-05-17 06:49
Go to main E-Print page  Edit Entry  Download Preprint  Delete Entry 

H-Alpha and Hard X-Ray Observations of a Two-Ribbon Flare Associated with a Filament Eruption  

Mingde Ding   Submitted: 2003-08-10 21:55

We perform a multi-wavelength study of a two-ribbon flare on 2002 September 29 and its associated filament eruption, observed simultaneously in the Hα line by a ground-based imaging spectrograph and in hard X-rays by RHESSI. The flare ribbons contain several Hα bright kernels that show different evolutional behaviors. In particular, we find two kernels that may be the footpoints of a loop. A single hard X-ray source appears to cover these two kernels and to move across the magnetic neutral line. We explain this as a result of the merging of two footpoint sources that show gradually asymmetric emission owing to an asymmetric magnetic topology of the newly reconnected loops. In one of the Hα kernels, we detect a continuum enhancement at the visible wavelength. By checking its spatial and temporal relationship with the hard X-ray emission, we ascribe it as being caused by electron beam precipitation. In addition, we derive the line-of-sight velocity of the filament plasma based on the Doppler shift of the filament-caused absorption in the Hα blue wing. The filament shows rapid acceleration during the impulsive phase. These observational features are in principal consistent with the general scenario of the canonical two-ribbon flare model.

Authors: Ding, M. D., Chen, Q. R., Li, J. P., and Chen, P. F.
Projects: None

Publication Status: ApJ (in press)
Last Modified: 2003-08-10 21:55
Go to main E-Print page  Edit Entry  Download Preprint  Delete Entry 


Key
Go to main E-Print pageGo to main E-Print page.
Download PreprintDownload Preprint.
Submitter's HomepageSubmitters Homepage.
Edit EntryEdit Entry.
Delete AbstractDelete abstract.

Abstracts by Author
The role of non-axisymmetry of magnetic flux rope in constraining solar eruptions
H-Alpha and Hard X-Ray Observations of a Two-Ribbon Flare Associated with a Filament Eruption

Related Pages
MSU Solar Physics.
Max Millennium Science Mail Archive.
Max Millennium Message of the Day Mail Archive.
Max Millennium Flare Catalog

Archive Maintainer
Alisdair Davey



© 2000-2020 Solar Physics Group - Montana State University