Letter to the Editor
Upwelling in a young sunspot
M. Sigwarth ,
W. Schmidt and
Received 23 September 1998 / Accepted 5 October 1998
An upflow of with a velocity exceeding 0.5 kms-1 is found in the umbra of the preceding spot in a young active region with ongoing flux emergence. A weak downflow is indicated in the corresponding spot of follower polarity. Such a flow pattern is consistent with the counter-rotation flow along a rising magnetic flux loop driven by the Coriolis force as predicted by numerical simulations.
Key words: sunspots Sun: magnetic fields Sun: photosphere Sun: activity
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This article contains no SIMBAD objects.
© European Southern Observatory (ESO) 1998
Online publication: October 22, 1998