E-Print Archive

There are 3887 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
Free Magnetic Energy and Flare Productivity of Active Regions View all abstracts by submitter

Ju Jing   Submitted: 2010-03-02 14:19

In this study, the photospheric vector magnetograms, obtained with the Spectro-Polarimeter of the Solar Optical Telescope on board Hinode, are used as the boundary conditions to extrapolate the three-dimensional non-linear force-free (NLFF) coronal magnetic fields. The observed non-force-free photospheric magnetic fields are preprocessed towards the nearly force-free chromospheric magnetic fields. The performance of the preprocessing procedure is evaluated by comparing with chromospheric magnetic fields obtained by the Vector SpectroMagnetograph instrument located on the Synoptic Optical Long-term Investigations of the Sun (SOLIS) Tower. Then the weighted optimization method is applied to the preprocessed boundary data to extrapolate the NLFF fields with which we are able to estimate the free magnetic energy stored in the active regions. The magnitude scaling correlation between the free magnetic energy and the soft X-ray flare index of active regions is then studied. The latter quantifies the impending flare production of active regions over the subsequent 1-, 2- and 3-day time windows. Based on 75 samples, we find a positive correlation between the free energy and the flare index. We also study the temporal variation of free magnetic energy for three active regions, of which two are flare-active and one is flare-quiet during the observation over a period of several days. While the magnitude of free magnetic energy unambiguously differentiates between the flare-active and the flare-quiet regions, the temporal variation of free magnetic energy does not exhibit a clear and consistent pre-flare pattern. This may indicate that the trigger mechanism of flares is as important as the energy storage in active regions.

Authors: Ju Jing, Changyi Tan, Yuan Yuan, Benjamin Wang, Thomas Wiegelmann, Yan Xu, and Haimin Wang
Projects: None

Publication Status: Accepted for Publication in The Astrophysical Journal.
Last Modified: 2010-04-19 09:53
Go to main E-Print page  The Diagnostics of the Kappa-Distributions  from  EUV Spectra  Evidence of a Plasmoid-Looptop Interaction and Magnetic Inflows During a Solar Flare/CME Eruptive Event  Edit Entry  Download Preprint  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
Cyclic Changes of the Sun's Seismic Radius
Onset of Photospheric Impacts and Helioseismic Waves in X9.3 Solar Flare of September 6, 2017
Solar Cycle Variations of Rotation and Asphericity in the Near-Surface Shear Layer
Solar coronal loop dynamics near the null point above active region NOAA 2666
Energetics of small electron acceleration episodes in the solar corona from radio noise storm observations
The origin of the modulation of the radio emission from the solar corona by a fast magnetoacoustic wave
Indirect solar wind measurements using archival cometary tail observations
Helium abundance and speed difference between helium ions and protons in the solar wind from coronal holes, active regions, and quiet Sun
Always a Farm Boy
Effect of transport coefficients on excitation of flare-induced standing slow-mode waves in coronal loops
Study of Three-dimensional Magnetic Structure and the Successive Eruptive Nature of Active Region 12371
Statistical study of magnetic non-potential measures in confined and eruptive flares
Quasi-periodic Counter-propagating Fast Magnetosonic Wave Trains from Neighboring Flares: SDO/AIA Observations and 3D MHD Modeling
Negative flare in the He I 10830 Å line in facula
Time resolved spectroscopic observations of an M-dwarf flare star EV Lac during a flare
Two Episodes of Magnetic Reconnections During a Confined Circular-ribbon Flare
Enhanced stellar activity for slow antisolar differential rotation?
Quasi-periodic pulsations in the most powerful solar flare of Cycle 24
GONG Catalog of Solar Filament Oscillations Near Solar Maximum
Chromospheric response during the precursor and the main phase of a B6.4 flare on August 20, 2005

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