E-Print Archive

There are 3672 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
Origin and Structures of Solar Eruptions I: Magnetic Flux Rope (Invited Review)
JHelioviewer - Time-dependent 3D visualisation of solar and heliospheric data
Acceleration and Propagation of Solar Energetic Particles
The First ALMA Observation of a Solar Plasmoid Ejection from an X-ray Bright Point
Observing the Sun with Atacama Large Millimeter/submillimeter Array (ALMA): High Resolution Interferometric Imaging
Exoplanet Predictions Based on Harmonic Orbit Resonances
On a role of quadruple component of magnetic field in defining solar activity in grand cycles
CME dynamics using STEREO & LASCO observations: the relative importance of Lorentz forces and solar wind drag
Impulsive plasma outflows due to wave driven magnetic reconnection
Propagation of Torsional Alfvén Waves from the Photosphere to the Corona: Reflection, Transmission, and Heating in Expanding Flux Tubes
Plasma parameters and geometry of cool and warm active region loops
Explosive chromospheric evaporation driven by nonthermal electrons around one footpoint of a solar flare loop
Nonlinear evolution of short-wavelength torsional Alfvén waves ?
Siberian Radioheliograph: First Results
Two Step Filament Eruption During 14-15 March 2015
Magnetic nulls and super-radial expansion in the solar corona
Evidence for two-loop interaction from IRIS and SDO observations of penumbral brightenings
Coronal cavities: observations and implications for the magnetic environment of prominences
A parameter study for modeling MgII h and k emission during solar flares
Relationships Between Characteristics of the Line-of-Sight Magnetic Field and Solar Flare Forecasts

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