Issue |
A&A
Volume 432, Number 1, March II 2005
|
|
---|---|---|
Page(s) | L1 - L4 | |
Section | Letters | |
DOI | https://doi.org/10.1051/0004-6361:200500029 | |
Published online | 22 February 2005 |
Letter to the Editor
Links between magnetic fields and plasma flows in a coronal hole
1
Max-Planck-Institut für Sonnensystemforschung, Max-Planck-Strasse 2, 37191 Katlenburg-Lindau, Germany e-mail: wiegelmann@linmpi.mpg.de
2
School of Earth and Space Sciences, Univ. of Science and Technology of China, Hefei 23006, PR China
Received:
15
October
2004
Accepted:
20
January
2005
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.
Key words: Sun: corona / Sun: magnetic field / Sun: UV radiation / Sun: Doppler shifts
© ESO, 2005
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