Aims: We aim to study the spot evolution and differential rotation in the magnetically active cool K-type giant star σ Gem from broadband photometry and...
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PublicationObserving the changing surface structures of the active K giant σ Geminorum with SONG
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PublicationOn the relation between active-region lifetimes and the autocorrelation function of light curves
Rotational modulation of stellar light curves due to dark spots encloses information on spot properties and, thus, on magnetic activity. In particular, the...
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PublicationProperties of starspots on CoRoT-2
Context. As a planet eclipses its parent star, a dark spot on the surface of the star may be occulted, causing a detectable variation in the light curve. Aims...
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PublicationPyTranSpot: A tool for multiband light curve modeling of planetary transits and stellar spots
Several studies have shown that stellar activity features, such as occulted and non-occulted starspots, can affect the measurement of transit parameters biasing...
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PublicationRoche tomography of cataclysmic variables - VI. Differential rotation of AE Aqr - not tidally locked!
We present Roche tomograms of the K4V secondary star in the cataclysmic variable AE Aqr, reconstructed from two data sets taken 9 d apart, and measure the...
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PublicationRoche tomography of cataclysmic variables - VII. The long-term magnetic activity of AE Aqr
We present a long-term study of the secondary star in the cataclysmic variable AE Aqr, using Roche tomography to indirectly image starspots on the stellar...
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PublicationROOSTER: a machine-learning analysis tool for Kepler stellar rotation periods
In order to understand stellar evolution, it is crucial to efficiently determine stellar surface rotation periods. Indeed, while they are of great importance in...
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PublicationRotation of Solar Analogs Crossmatching Kepler and Gaia DR2
A major obstacle to interpreting the rotation period distribution for main-sequence stars from Kepler mission data has been the lack of a precise evolutionary...
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PublicationRotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators
We determine rotation periods of a sample of 48 late F-type to mid-M dwarf stars using time series high-resolution spectroscopy of the Ca II H&K and H α...