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Kelu-1 AB - A possible brown dwarf triple system
M. B. Stumpf, W. Brandner, Th. Henning +5
We have monitored the benchmark L dwarf binary Kelu-1AB over the past 3 years to derive improved spectral types and luminosities for the individual components. The astrometric meas…
Discovery of 18 Jupiter mass RV companion orbiting the brown dwarf candidate ChaHa8
Viki Joergens, Andre Mueller
We report the discovery of a 16-20 Jupiter mass radial velocity companion around the very young (3 Myr) brown dwarf candidate ChaHa8. Based on high-resolution echelle spectra of Ch…
Radial velocity survey for planets and brown dwarf companions to very young brown dwarfs and very low-mass stars in ChaI with UVES at the VLT
V. Joergens
We present results of a radial velocity (RV) survey for planets and brown dwarf (BD) companions to very young BDs and (very) low-mass stars (VLMSs) in ChaI. High-resolution echelle…
Towards characterization of exoplanetary atmospheres with the VLT Interferometer
Viki Joergens, Andreas Quirrenbach
The direct observation of extrasolar planets and their spectra is coming into reach with the new generation of ground-based near-IR interferometers, like the Very Large Telescope I…
Rotational Periods of very Young Brown Dwarfs in ChaI
V. Joergens, Matilde Fernandéz, Ralph Neuhäuser +1
A photometric monitoring campaign of brown dwarfs in the ChaI star forming region in the i and R band revealed significant periodic variations of the three M6.5-M7 type brown dwarf…
Spirals and the size of the disk in EX Dra
V. Joergens, H. C. Spruit, R. G. M. Rutten
Observations at high spectral and temporal resolution are presented of the dwarf nova EX Dra in outburst. The disk seen in the He I line reconstructed by Doppler tomography shows a…