35 citations · 55 across the 14 of their papers we have counts for
5 papers · 1 filter
Forward modeling solar spectra onto Doppler images of λ And
Ö. Adebali, A. G. M. Pietrow
By using the Doppler images of λ And, we aim to investigate whether surface temperature information can be reversed to create its activity parameters, by feeding a toy model with s…
Thermal background reduction for mid-infrared imaging by low-rank background and sparse point-source modelling
R. A. R. Moens, A. G. M. Pietrow, B. Brandl +1
Mid-infrared astronomy from the ground faces critical challenges in accurately detecting and quantifying sources due to the dominant spatially and time-variable background noise. M…
Prominence signatures in the Fraunhofer G-band; Testing ionization memory with multi-line prominence diagnostics
A. G. M. Pietrow, H. Balthasar, P. Váradi Nagy +4
The Fraunhofer G-band around 4304 Å is widely used as a photospheric diagnostic and is generally not expected to show signatures of chromospheric or coronal structures. However, re…
Chromospheric and photospheric properties of sunspots as inferred from Stokes inversions under magneto-hydrostatic and non-local-thermodynamic equilibrium
A. Vicente Arevalo, J. M. Borrero, I. Milic +3
Sunspots are crucial for exploring how magnetic fields and plasma flows interact in the solar atmosphere, spanning from the stable photosphere to the shock-dominated chromosphere.…
Does the solar oxygen abundance change over the solar cycle? An investigation into activity-induced variations of the O I infrared triplet
A. G. M. Pietrow, M. Baratella, I. V. Ilyin +2
The determination of the solar oxygen abundance remains a central problem in astrophysics, as its accuracy is limited not only by models but also by systematics. While many of thes…