PREDNASAJUCI / LECTURER : 

Mgr. Marcela Bodnarova

NAZOV / TITLE : 

Dynamics of the DOT/LaPalma G-band bright points

ABSTRAKT / ABSTRACT : 

Small-scale magnetic field concentrations (~1 kG) in the solar photosphere 
can be identified in G-band of the solar spectrum as bright points. 
The study of G-band bright points (GBPs) dynamics can help us in solving 
several questions related also to the coronal heating problem. Here a set 
of 142 G-band speckled images obtained using the Dutch Open Telescope (DOT) 
on October 19, 2005 with a time resolution of 30s,is used to study the motion
of GBPs. GBPs were identified and tracked on the images of the data set using 
the algorithm developed by Utz et al. (2009, 2010).
We studied the velocity, the directions of motion and the evolution of motion
of identified and tracked GBPs in a small region of the quiet Sun.
We found out that the tracked GBPs move with a mean velocity 1.06 ± 0.688 km/s.
They tend to retain their direction of motion for two time steps (30 s), but
they are likely to change it after the following time step (60 s). 
The observed motion of GBPs is minimal (102.6-205.2 km during their whole existence) and no traveling of GBPs around the granule edges was observed.