29 citations · 50 across the 3 of their papers we have counts for
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Solar active region evolution and imminent flaring activity through a color-coded visualization of photospheric vector magnetograms
I. Kontogiannis, A. G. M. Pietrow, M. K. Druett +3
The emergence of magnetic flux, its transition to complex configurations, and the pre-eruptive state of active regions are probed using photospheric magnetograms. We aim to pinpoin…
A comparative study of two X2.2 and X9.3 solar flares observed with HARPS-N: Reconciling Sun-as-a-star spectroscopy and high-spatial resolution solar observations in the context of the solar-stellar connection
A. G. M. Pietrow, M. Cretignier, M. K. Druett +14
Stellar flares cannot be spatially resolved, which complicates ascertaining the physical processes behind particular spectral signatures. Due to their proximity to Earth, solar fla…
High-resolution spectroscopy of a surge in an emerging flux region
M. Verma, C. Denker, A. Diercke +6
High-spectral resolution observations using the VTT echelle spectrograph in the chromospheric H line were obtained in the early growth phase of active region NOAA 12722. Noise-s…
Image Quality in High-resolution and High-cadence Solar Imaging
C. Denker, E. Dineva, H. Balthasar +4
Broad-band imaging and even imaging with a moderate bandpass (about 1 nm) provides a "photon-rich" environment, where frame selection ("lucky imaging") becomes a helpful tool in im…
Counter-streaming flows in a giant quiet-Sun filament observed in the extreme ultraviolet
A. Diercke, C. Kuckein, M. Verma +1
A giant solar filament was visible on the solar surface from 2011 Nov. 8-23. The filament stretched over more than half a solar diameter. Multiwavelength data from the SDO instrume…