Abstract:
We have analysed a 6-hour long time sequence of ultraviolet (uv) images obtained
on May 24, 2003 in 1600 Å continuum under high spatial and temporal resolutions
from the Transition Region and Coronal Explorer (TRACE). We have selected 15 isolated
bright points, 15 network elements and 15 quiet background regions from these images for
detailed analysis. We derived the cumulative intensity values and the light curves of these
features for the total duration of observations, and performed also a power spectrum analysis
using the complete time series data. We found that the uv bright points, the uv network
and the uv background regions exhibit long-period intensity oscillations namely, 5.5 hours,
4.6 hours and 3.4 hours respectively, in addition to the more familiar small scale intensity
fluctuations. We suggest that these longer periods of oscillation might be related to solar
atmospheric g-modes.
