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45 papers · 2 filters
Differences in physical properties of coronal bright points and their ALMA counterparts within and outside coronal holes
F. Matković, R. Brajša, M. Temmer +6
This study investigates and compares brightness and area of coronal bright points (CBPs) inside and outside of coronal holes (CHs) using the single-dish Band 6 observations by the…
The solar photospheric silicon abundance according to CO5BOLD: Investigating line broadening, magnetic fields, and model effects
S. A. Deshmukh, H. -G. Ludwig, A. Kučinskas +5
In this work, we present a photospheric solar silicon abundance derived using CO5BOLD model atmospheres and the LINFOR3D spectral synthesis code. Previous works have differed in th…
NLTE analysis of the methylidyne radical (CH) molecular lines in metal-poor stellar atmospheres
S. A. Popa, R. Hoppe, M. Bergemann +3
An analysis of the CH molecule in non-local thermodynamic equilibrium (NLTE) is performed for the physical conditions of cool stellar atmospheres typical of red giants (log g = 2.0…
The SPHERE view of three interacting twin disc systems in polarised light
Philipp Weber, Sebastián Pérez, Greta Guidi +12
Dense stellar environments as hosts of ongoing star formation increase the probability of gravitational encounters among stellar systems during the early stages of evolution. Stell…
The effects of stellar rotation along the main sequence of the 100 Myr old massive cluster NGC 1850
Sebastian Kamann, Sara Saracino, Nate Bastian +13
Young star clusters enable us to study the effects of stellar rotation on an ensemble of stars of the same age and across a wide range in stellar mass and are therefore ideal targe…
The CARMENES search for exoplanets around M dwarfs. Variability on long timescales as seen in chromospheric indicators
B. Fuhrmeister, S. Czesla, V. Perdelwitz +19
It is clearly established that the Sun has an 11-year cycle that is caused by its internal magnetic field. This cycle is also observed in a sample of M dwarfs. In the framework of…