54 citations · 577 across the 35 of their papers we have counts for
4 papers · 1 filter
Large-scale horizontal flows in the solar photosphere. IV. On the vertical structure of large-scale horizontal flows
Michal Svanda, Mirek Klvana, Michal Sobotka +2
In the recent papers, we introduced a method utilised to measure the flow field. The method is based on the tracking of supergranular structures. We did not precisely know, whether…
Large-scale horizontal flows in the solar photosphere II: Long-term behaviour and magnetic activity response
Michal Svanda, Mirek Klvana, Michal Sobotka +1
Recently, we have developed a method useful for mapping large-scale horizontal velocity fields in the solar photosphere. The method was developed, tuned and calibrated using the sy…
GREGOR: the New German Solar Telescope
H. Balthasar, O. von der Lühe, F. Kneer +17
GREGOR is a new open solar telescope with an aperture of 1.5m. It replaces the former 45-cm Gregory Coude telescope on the Canary island Tenerife. The optical concept is that of a…
Phase diversity restoration of sunspot images I. Relations between penumbral and photospheric features
J. A. Bonet, I. Marquez, R. Muller +2
We investigate the dynamics of and the relations between small-scale penumbral and photospheric features near the outer penumbral boundary: penumbral grains (PGs), dark penumbral f…