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At the Bottom of the Main Sequence: Activity and magnetic fields beyond the threshold to complete convection
Ansgar Reiners
The bottom of the main sequence hosts objects with fundamentally different properties. At masses of about 0.3 M, stars become fully convective and at about 0.08 M$_{\odot…
Detection of strong activity in the eclipsing binary brown dwarf 2MASSJ05352184-0546085 - A possible explanation for the temperature reversal
A. Reiners, A. Seifahrt, K. G. Stassun +2
We show high resolution spectra of the eclipsing brown dwarf binary 2MASSJ05352184-0546085 taken at the two opposite radial velocity maxima. Comparisons of the TiO bands to model a…
Ultra-Cool and Extra-Vigorous: Rotation and Activity in M and L dwarfs
Ansgar Reiners
The study of rotation and activity in low-mass stars or brown dwarfs of spectral classes M and L has seen enormous progress during the last years. I summarize the results from diff…
A high resolution spectral atlas of brown dwarfs
A. Reiners, D. Homeier, P. H. Hauschildt +1
We present a UVES/VLT high resolution atlas of three L dwarfs and one T dwarf system, spectral classes at which most of the objects are brown dwarfs. Our atlas covers the optical r…
Spectral type dependent rotational braking and strong magnetic flux in three components of the late-M multiple system LHS 1070
Ansgar Reiners, Andreas Seifahrt, Hans Ulrich Käufl +2
We show individual high resolution spectra of components A, B, and C of the nearby late-M type multiple system LHS 1070. Component A is a mid-M star, B and C are known to have mass…
Rapid magnetic flux variability on the flare star CN Leonis
A. Reiners, J. H. M. M. Schmitt, C. Liefke
We present UVES/VLT observations of the nearby flare star CN Leo covering the Wing-Ford FeH band near 1mu with high spectral resolution. Some of the FeH absorption lines in this ba…