179 citations · 2.3k across the 86 of their papers we have counts for
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The chromospherically active binary star EI Eridani II. Long-term Doppler imaging
A. Washuettl, K. G. Strassmeier, M. Weber
Data from 11 years of continuous spectroscopic observations of the active RS CVn-type binary star EI Eridani - gained at NSO/McMath-Pierce, KPNO/Coude Feed and during the MUSICOS 9…
The chromospherically active binary star EI Eridani I. Absolute dimensions
A. Washuettl, K. G. Strassmeier, T. Granzer +2
We present a detailed determination of the astrophysical parameters of the chromospherically active binary star EI Eridani. Our new radial velocities allow to improve the set of or…
A fast method for Stokes profile synthesis -- Radiative transfer modeling for ZDI and Stokes profile inversion
T. A. Carroll, M. Kopf, K. G. Strassmeier
The major challenges for a fully polarized radiative transfer driven approach to Zeeman-Doppler imaging are still the enormous computational requirements. In every cycle of the ite…
First time-series optical photometry from Antarctica
K. G. Strassmeier, R. Briguglio, T. Granzer +11
Beating the Earth's day-night cycle is mandatory for long and continuous time-series photometry and had been achieved with either large ground-based networks of observatories at di…
Chromospheric features of LQ Hydrae from H-alpha line profiles
A. Frasca, Zs. Kovari, K. G. Strassmeier +1
We analyze the H-alpha spectral variability of the rapidly-rotating K1-dwarf LQ Hya using high-resolution H-alpha spectra recorded during April-May 2000. Chromospheric parameters w…
Zeeman-Doppler Imaging of Late-Type Stars -- The Surface Magnetic Field of II Peg
T. A. Carroll, M. Kopf, I. Ilyin +1
Late-type stars in general possess complicated magnetic surface fields which makes their detection and in particular their modeling and reconstruction challenging. In this work we…