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The activity and rotation limit in the Hyades
U. Seemann, A. Reiners, A. Seifahrt +1
We conduct a study of K to M type stars to investigate the activity and the rotation limit in the Hyades. We use a sample of 40 stars in this intermediate-age cluster (~625 Myr) to…
Magnetic fields in M-dwarfs: quantitative results from detailed spectral synthesis in FeH lines
D. Shulyak, A. Reiners, S. Wende +3
Strong surface magnetic fields are ubiquitously found in M-dwarfs with mean intensities on the order of few thousand Gauss-three orders of magnitude higher than the mean surface ma…
Investigation of magnetically sensitive FeH lines
Sebastian Wende, Ansgar Reiners, Andreas Seifahrt +2
M-type stars exhibit strong magnetic fields towards decreasing effective temperatures. The measurement of these fields is complicated due to missing indicators. Molecular FeH lines…
Correcting METIS spectra for telluric absorption to maximize spectral fidelity
Stefan Uttenthaler, Klaus M. Pontoppidan, Andreas Seifahrt +10
METIS is a mid-infrared instrument proposed for the European Extremely Large Telescope (E-ELT). It is designed to provide imaging and spectroscopic capabilities in the 3 - 14 micro…
Synthesising, using, and correcting for telluric features in high-resolution astronomical spectra
A. Seifahrt, H. U. Käufl, G. Zängl +3
We present a technique to synthesise telluric absorption and emission features both for in-situ wavelength calibration and for their removal from astronomical spectra. While the pr…
Modelling the molecular Zeeman effect in M-dwarfs: methods and first results
D. Shulyak, A. Reiners, S. Wende +3
We present first quantitative results of the surface magnetic field measurements in selected M-dwarfs based on detailed spectra synthesis conducted simultaneously in atomic and mol…