E-Print Archive

There are 2662 abstracts currently viewable.
There is a problem with some abstracts that became corrupted following database issues. These will be restored as soon as possible.


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
Measuring the Magnetic Field Strength of the Quiet Solar Corona Using ''EIT Waves''
ELECTRON AND PROTON ACCELERATION DURING THE FIRST GROUND LEVEL ENHANCEMENT EVENT OF SOLAR CYCLE 24
BIDIRECTIONAL FLUXES OF NEARLY RELATIVISTIC ELECTRONS DURING THE ONSET OF SOLAR ENERGETIC PARTICLE EVENTS
Solar-cycle related variation of solar differential rotation
Internal-cycle variation of solar differential rotation
The standard flare model in three dimensions III. Slip-running reconnection properties
Global axis shape of magnetic clouds deduced from the distribution of their local axis orientation
Fine-scale Structures of Flux Ropes Tracked by Erupting Material
The influence of numerical resolution on coronal density in hydrodynamic models of impulsive heating
Spectral diagnostics with the SDO EVE flare lines
A revised radiometric calibration for the Hinode/EIS instrument
Disturbances in the U.S. electric grid associated with geomagnetic activity
Origin of Macrospicule and Jet in Polar Corona by A Small-scale Kinked Flux-Tube
Spatially Resolved Microwave Observations of Multiple Periodicities in a Flaring Loop
Changes in quasi-periodic variations of solar photospheric fields: precursor to the deep solar minimum in the cycle 23?
Pathways of large-scale magnetic couplings between coronal events
Superflares on Solar-Type Stars Observed with Kepler II. Photometric Variability of Superflare-Generating Stars : A Signature of Stellar Rotation and Starspots
A Challenging Solar Eruptive Event of 18 November 2003 and the Causes of the 20 November Geomagnetic Superstorm. I. Unusual History of an Eruptive Filament
Hi-C & AIA observations of transverse MHD waves in active regions
Geometric properties of acoustic waves generated by a point source in the solar-like interior: effects of acoustic cutoff frequency

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