Volume 436, Number 3, June IV 2005
|Page(s)||1075 - 1086|
|Published online||03 June 2005|
Magnetic network dynamics: Activity level, feature size and anchoring depth
Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées, 57 avenue d'Azereix, BP 826, 65008 Tarbes Cedex, France e-mail: email@example.com
Accepted: 16 February 2005
A large data set of MDI magnetograms is studied in order to analyze the global dynamics of magnetic structures from network to active regions. Two complementary techniques are used: feature tracking and correlation tracking. The very large data set allows the variation of their dynamics (angular rotation velocity and meridional circulation) to be studied in detail. Variation both in the dynamics as a function of size and distance to active regions (for feature tracking) and as a function of activity level in the correlation box are studied. These new results allow the possible anchoring depth of these magnetic features to be constrained. The observations of the magnetic network dynamics are not consistent with the dynamics deduced from helioseismology. So, some additional processes must be acting on the magnetic network in order to explain their global dynamics.
Key words: Sun: magnetic fields / Sun: photosphere / Sun: faculae, plages
© ESO, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.