We compare the small-scale features visible in the Ne viii Doppler-shift map of an equatorial coronal hole (CH) as observed by SUMER with the small-scale structures of the magnetic field as constructed from a simultaneous photospheric magnetogram by a potential magnetic-field extrapolation. The combined data set is analysed with respect to the small-scale flows of coronal matter, which means that the Ne viii Doppler-shift used as tracer of the plasma flow is investigated in close connection with the ambient magnetic field. Some small closed-field regions in this largely open CH are also found in the coronal volume considered. The Doppler-shift patterns are found to be clearly linked with the field topology.
@article{arxiv.0801.4724,
title = {Links between magnetic fields and plasma flows in a coronal hole},
author = {T. Wiegelmann and L. D. Xia and E. Marsch},
journal= {arXiv preprint arXiv:0801.4724},
year = {2009}
}