28 citations · 312 across the 31 of their papers we have counts for
32 papers
Properties of Circumfacular Regions derived from H and Ca II K synoptic observations of the Sun
Serena Criscuoli, Andrea Diercke
Circumfacular regions are dark chromospheric structures surrounding magnetic regions whose properties and contribution to solar activity diagnostics remain poorly understood. We in…
An Unusual Velocity Field in a Sunspot Penumbra
H. Balthasar, C. Denker, A. Diercke +6
The photospheric Evershed flow is normally oriented radially outward, yet sometimes opposite velocities are observed not only in the chromosphere but also in the photospheric layer…
A Universal Method for Solar Filament Detection from H-alpha Observations using Semi-supervised Deep Learning
Andrea Diercke, Robert Jarolim, Christoph Kuckein +7
Filaments are omnipresent features in the solar atmosphere. Their location, properties and time evolution can provide information about changes in solar activity and assist the ope…
On the short term stability and tilting motion of a well-observed low-latitude solar coronal hole
Stephan G. Heinemann, Stefan J. Hofmeister, James A. Turtle +5
The understanding of the solar magnetic coronal structure is tightly linked to the shape of open field regions, specifically coronal holes. A dynamically evolving coronal hole coin…
Characterization of chromospheric activity based on Sun-as-a-star spectral and disk-resolved activity indices
Ekaterina Dineva, Jeniveve Pearson, Ilia Ilyin +4
The strong chromospheric absorption lines Ca H & K are tightly connected to stellar surface magnetic fields. Only for the Sun, spectral activity indices can be related to evolving…
Solar Hα excess during Solar Cycle 24 from full-disk filtergrams of the Chromospheric Telescope
A. Diercke, C. Kuckein, P. W. Cauley +4
The chromospheric H-alpha spectral line is a strong line in the spectrum of the Sun and other stars. In the stellar regime, this spectral line is already used as a powerful tracer…