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Heating of the solar photosphere during a white-light flare
Jan Jurcak, Jana Kasparova, Michal Svanda +1
The \ion{Fe}{i} lines observed by the Hinode/SOT spectropolarimeter were always seen in absorption, apart from the extreme solar limb. Here we analyse a unique dataset capturing th…
Recent advancements in the EST project
Jan Jurcak, Manuel Collados, Jorrit Leenaarts +2
The European Solar Telescope (EST) is a project of a new-generation solar telescope. It has a large aperture of 4~m, which is necessary for achieving high spatial and temporal reso…
Properties of the inner penumbral boundary and temporal evolution of a decaying sunspot
M. Benko, S. J. González Manrique, H. Balthasar +3
It was empirically determined that the umbra-penumbra boundaries of stable sunspots are characterized by a constant value of the vertical magnetic field. We analyzed the evolution…
Comparison of theoretical and observed Ca~{\sc ii}~8542 Stokes profiles in quiet regions at the centre of the solar disc
Jan Jurcak, Jiri Stepan, Javier Trujillo Bueno +1
Interpreting the Stokes profiles observed in quiet regions of the solar chromosphere is a challenging task. The Stokes Q and U profiles are dominated by the scattering polarisation…
Understanding the HMI pseudocontinuum in white-light solar flares
M. Svanda, Jan Jurcak, Jana Kasparova +1
We analyse observations of the X9.3 solar flare (SOL2017-09-06T11:53) observed by SDO/HMI and Hinode/SOT. Our aim is to learn about the nature of the HMI pseudocontinuum Ic used as…