52 citations · 212 across the 27 of their papers we have counts for
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The calm before the storm: High spatial resolution mosaic of active region NOAA 14274 at the onset of an X1.2 flare
Carsten Denker, Robert Kamlah, Meetu Verma +1
Active region NOAA 14274 produced some of the strongest flares of Solar Cycle 25, including the X1.2 and X5.1 flares on 10 and 11 November 2025, respectively. We present the first…
High-spectral Resolution, Multi-wavelength Center-to-limb Observations of the Sun
Meetu Verma, Carsten Denker, Alexander G. M. Pietrow +2
The center-to-limb variations (CLVs) of photospheric and chromospheric spectral lines were obtained in 2025 July and August using drift scans from the echelle spectrograph of the 0…
On the center-to-limb variations of the He I 10830 Å triplet
A. G. M. Pietrow, C. Kuckein, M. Verma +4
We present high-resolution spectroscopic observations of the quiet-Sun center-to-limb variations (CLV) of the He I triplet at 10830 Å and the nearby Si I 10827 Å line, observed wit…
Automatic detection of Ellerman bombs in the H line
A. Faryad, A. G. M. Pietrow, M. Verma +1
Ellerman bombs (EBs) are small and short-lived magnetic reconnection events in the lower solar atmosphere, most commonly reported in the line wings of the H line. These events a…
Differential rotation of solar α sunspots and implications for stellar light curves
Emily Joe Lößnitz, Alexander G. M. Pietrow, Hritam Chakraborty +5
Differential rotation is a key driver of magnetic activity and dynamo processes in the Sun and other stars, especially as the rate differs across the solar layers, but also in acti…
Synthesizing Sun-as-a-star flare spectra from high-resolution solar observations
M. De Wilde, A. G. M. Pietrow, M. K. Druett +22
Spatially resolved observations of the Sun and the astronomical sample size of stellar bodies are the respective key strengths of solar and stellar observations. However, the large…
Multi-wavelength observations of substructures in solar flare ribbons
Vishal Singh, Eamon Scullion, Gert J. J. Botha +6
Solar flare ribbons are extensive brightenings in the chromosphere during flares, often showing fine scale structuring that reflects the underlying energy release. Using high caden…