122 citations · 1.1k across the 38 of their papers we have counts for
38 papers
New rotation period measurements of 67,163 Kepler stars
Timo Reinhold, Alexander I. Shapiro, Sami K. Solanki +1
The Kepler space telescope leaves a legacy of tens of thousands of stellar rotation period measurements. While many of these stars show strong periodicity, there exists an even big…
Spectral variability of photospheric radiation due to faculae II: Facular contrasts for cool main-sequence stars
Charlotte M. Norris, Yvonne C. Unruh, Veronika Witzke +5
Magnetic features on the surface of stars, such as spots and faculae, cause stellar spectral variability on time-scales of days and longer. For stars other than the Sun, the spectr…
MPS-ATLAS library of stellar model atmospheres and spectra
N. Kostogryz, A. I Shapiro, V. Witzke +5
Stellar spectra contain a large amount of information about the conditions in stellar atmospheres. However, extracting this information is challenging and demands comprehensive num…
Can 1D radiative equilibrium models of faculae be used for calculating contamination of transmission spectra?
Veronika Witzke, Alexander I. Shapiro, Nadiia M. Kostogryz +5
The reliable characterization of planetary atmospheres with transmission spectroscopy requires realistic modeling of stellar magnetic features, since features that are attributable…
Small-scale dynamo in cool main sequence stars. II. The effect of metallicity
V. Witzke, H. B. Duehnen, A. I. Shapiro +4
All cool main sequence stars including our Sun are thought to have magnetic fields. Observations of the Sun revealed that even in quiet regions small-scale turbulent magnetic field…
Superflares on solar-like stars: A new method for identifying the true flare sources in photometric surveys
Valeriy Vasilyev, Timo Reinhold, Alexander I. Shapiro +5
Over the past years, thousands of stellar flares have been detected by harvesting data from large photometric surveys. These detections, however, do not account for potential sourc…