Role of small-scale dynamics in coronal
holes and quiet regions for coronal heating and solar wind
acceleration
Y. Yamauchi, H. Wang, and R. L. Moore
Small-scale dynamics such as macrospicules, microflares, and
mini-filament eruptions are of interest because they are
believed to play an important role in coronal heating and
solar wind acceleration in coronal holes and quiet regions
through the magnetic network activity. We made high-spatial and
tempposter resolution TRACE UV/EUV observations of coronal holes
and quiet regions in September 2004 jointly with BBSO H-alpha
and magnetogram observations. From the observations, we study
the dynamics, structure, and magnetic setting of small-scale
explosive events in coronal holes and in quiet regions. Most
macrospicules showed brightening at their base in CIV images.
This is compatible with these macrospicules being driven by
explosive reconnection between short magnetic loops and
high-reaching field lines rooted in the network.
We also investigate where the differences of physical properties
in coronal holes and quiet regions come from, even though the
fine-scale magnetic activity of the network is expected to be
essentially important in both regions. We report whether any
differences between the events in coronal holes and quiet
regions are seen. We discuss what we expect of the Solar-B
mission for the study of small-scale dynamics on the basis
on our observations.
Correspondence
Yohei Yamauchi(yohei.yamauchi@njit.edu), CSTR/NJIT
presentation
poster