Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26as..118...35b&link_type=abstract
Astronomy and Astrophysics Supplement, v.118, p.35-46
Astronomy and Astrophysics
Astrophysics
8
Sun: Sunspots, Sun: Magnetic Field, Sun: Doppler Motions
Scientific paper
We document the evolution of an additional magnetic flux in the photosphere of a fully developed sunspot group, we measure longitudinal magnetic field, line-of-sight motions, and proper motions of sunspots in the group during this process. We demonstrate the close correlation of magnetic field, Doppler and proper motion singularities with the area in which additional magnetic flux appears and the new penumbrae and umbrae develop. We discuss the probable reasons for this fact and for the region's weak flare activity. There exist in the group about eight sunspots with the Evershed effect, differing in form, in dependence on the history of development of the spot in which it is observed.
Bumba Vaclav
Kalman Béla
Klvana Mirek
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