  G-band bright points (GBPs) are regarded as good manifestations of magnetic
flux concentrations. We aim to investigate the relationship between the dynamic
properties of GBPs and their longitudinal magnetic field strengths. High
spatial and temporal resolution observations were recorded simultaneously with
G-band filtergrams and Narrow-band Filter Imager (NFI) Stokes I and V images
with Hinode /Solar Optical Telescope. The GBPs are identified and tracked in
the G-band images automatically, and the corresponding longitudinal magnetic
field strength of each GBP is extracted from the calibrated NFI magnetograms by
a point-to-point method. After categorizing the GBPs into five groups by their
longitudinal magnetic field strengths, we analyze the dynamics of GBPs of each
group. The results suggest that with increasing longitudinal magnetic field
strengths of GBPs correspond to a decrease in their horizontal velocities and
motion ranges as well as by showing more complicated motion paths. This
suggests that magnetic elements showing weaker magnetic field strengths prefer
to move faster and farther along straighter paths, while stronger ones move
more slowly in more erratic paths within a smaller region. The dynamic
behaviors of GBPs with different longitudinal magnetic field strengths can be
explained by that the stronger flux concentrations withstand the convective
flows much better than weaker ones.
