E-Print Archive

There are 3053 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
Ideal kink instability of a magnetic loop equilibrium View all abstracts by submitter

Bernhard Kliem   Submitted: 2003-11-06 17:26

The force-free coronal loop model by Titov & D'emoulin (1999) is found to be unstable with respect to the ideal kink mode, which suggests this instability as a mechanism for the initiation of flares. The long-wavelength (m=1) mode grows for average twists Phi gtrsim 3.5pi (at a loop aspect ratio of approx 5). The threshold of instability increases with increasing major loop radius, primarily because the aspect ratio then also increases. Numerically obtained equilibria at subcritical twist are very close to the approximate analytical equilibrium; they do not show indications of sigmoidal shape. The growth of kink perturbations is eventually slowed down by the surrounding potential field, which varies only slowly with radius in the model. With this field a global eruption is not obtained in the ideal MHD limit. Kink perturbations with a rising loop apex lead to the formation of a vertical current sheet below the apex, which does not occur in the cylindrical approximation. (See animation at http://www.aip.de/~kli/Fi252.gif)

Authors: T. Toeroek, B. Kliem, and V. S. Titov
Projects:

Publication Status: Astron. Astrophys. Lett., accepted
Last Modified: 2003-11-07 15:51
Go to main E-Print page  Formation of current sheets and sigmoidal structure by the kink instability of a magnetic loop  The evolution of twisting coronal magnetic flux tubes  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

Key
Go to main E-Print pageGo to main E-Print page.
Previous AbstractPrevious Abstract.
Next AbstractNext Abstract.
Download PreprintDownload Preprint.
Submitter's HomepageSubmitters Homepage.
Edit EntryEdit Entry.
View All Abstracts By SubmitterView all abstracts by submitter.
Delete AbstractDelete abstract.

Latest Entries
Energy propagation by transverse waves in multiple flux tube systems using filling factors
Coronal Fourier power spectra: implications for coronal seismology and coronal heating
Relationship between the Magnetic Flux of Solar Eruptions and the Ap Index of Geomagnetic Storms
Early Evolution of an Energetic Coronal Mass Ejection and Its Relation to EUV Waves
The Formation of Kappa-Distribution Accelerated Electron Populations in Solar Flares
Superflare occurrence and energies on G-, K- and M-type dwarfs
Comment on ``Detection and characterization of 0.5--8 MeV neutrons near Mercury: Evidence for a solar origin"
How Can Active Region Plasma Escape into the Solar Wind from below a Closed Helmet Streamer?
On the Area Expansion of Magnetic Flux-Tubes in Solar Active Regions
NEW INSIGHTS INTO THE PHYSICAL NATURE OF CORONAL MASS EJECTIONS AND ASSOCIATED SHOCK WAVES WITHIN THE FRAMEWORK OF THE THREE-DIMENSIONAL STRUCTURE
Three-dimensional Magnetic Restructuring in Two Homologous Solar Flares in the Seismically Active NOAA AR 11283
Signatures of the non-Maxwellian kappa-distributions in optically thin line spectra I. Theory and synthetic Fe IX--XIII spectra
The Relation Between Large-Scale Coronal Propagating Fronts and Type II Radio Bursts
The Relation Between Large-Scale Coronal Propagating Fronts and Type II Radio Bursts
A simple model of chromospheric evaporation and condensation driven conductively in a solar flare
Conversion from mutual helicity to self-helicity observed with IRIS
Understanding CME and associated shock in the solar corona by merging multi wavelengths observation
The Late Gradual Phase of Large Flares: The Case of November 3, 2003
Formation of Compound Flux Rope by The Merging of Two Filament Channels, Associated Dynamics and its Stability
Observational Characteristics of CMEs without Low Coronal Signatures

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



© 2003 Solar Physics Group - Montana State University