On the motion and physical properties of magnetic bright points in the solar photosphere
Abstract
High-resolution observations of the solar photosphere have revealed the existence of structures composed of
tiny Magnetic Bright Points, or MBPs. Such small-scale structures are associated with regions of strong
magnetic field on the order of kilogauss (kG). Various studies have investigated some of the physical
properties of MBPs thanks to high-resolution observations that currently allow defining details and evolution
of these structures. The present study analyzes some of these dynamic parameters through the use of
time series of images of the solar photosphere acquired with the HiFI/GREGOR high-resolution groundbased
solar telescope in the G band (4308 Å) and the space-borne telescope Hinode. MBPs are tracked to
determine their proper motions. Additionally, light curves are obtained that show its variation in intensity
and the behavior of size and trajectory throughout its life time is analyzed. The results establish that the
measurements of the dynamic parameters of the MBPs are influenced by the instrument used, since different
parameters are obtained with the change in spatial and temporal resolution.
Keywords
Sun: photosphere, evolution, observational methods.
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