Dynamics of Active Regions Revealed by Tracking of Doppler Features

0355090 - ASÚ 2011 RIV DE eng C - Conference Paper (international conference)
Švanda, Michal - Sobotka, Michal - Klvaňa, Miroslav - Bumba, Václav
Dynamics of Active Regions Revealed by Tracking of Doppler Features.
Magnetic Coupling between the Interior and Atmosphere of the Sun. Berlin: Springer, 2010 - (Hasan, S.), s. 410-412. Astrophysics and Space Science Proceedings. ISBN 978-3-642-02858-8. ISSN 1570-6591.
[Magnetic Coupling between the Interior and Atmosphere of the Sun. Bangalore (IN), 02.12.2008-05.12.2008]
R&D Projects: GA AV ČR IAA300030808
Institutional research plan: CEZ:AV0Z10030501
Keywords : coronal mas ejections * evershed effect * helioseismology
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics

We investigate the large-scale horizontal dynamics of active regions in the 23rd solar cycle. The large-scale horizontal velocity fields were measured applying the local correlation tracking (LCT) algorithm to the processed high-cadence full-resolution full-disc MDI Dopplergrams. We performed the selection of NOAA active regions in the available dataset and followed their individual evolution in time. The statistical study of this sample gives us a unique opportunity to study the dynamics of active regions at various stages of their evolution. In few cases, we found behavior that is consistent with the dynamical disconnection of sunspots from the magnetic roots.
Permanent Link: http://hdl.handle.net/11104/0193935