242 citations · 617 across the 15 of their papers we have counts for
9 papers · 2 filters
Spectral synthesis analysis and radial velocity study of the northern F-, G-, and K-type flare-stars
B. König, E. W. Guenther, M. Esposito +1
In this publication we present a study of the general physical, chemical properties and radial velocity monitoring of young active stars. We derive temperatures, log g, [Fe/H], v s…
The low-mass companion of GQ Lup
E. W. Guenther, R. Neuhaeuser, G. Wuchterl +3
Using NACO on the VLT in the imaging mode we have detected an object at a distance of only 0.7 arcsec from GQ Lup. The object turns out to be co-moving. We have taken two K-band sp…
Planets of young stars: the TLS radial velocity survey
M. Esposito, E. Guenther, A. P. Hatzes +1
We report on the search for planets orbiting 46 nearby young stars performed at the State Observatory of Turingia (TLS) by means of a radial velocity survey. The aim of this progra…
NAHUAL: A cool spectrograph for planets of ultra-cool objects
E. W. Guenther, E. L. Martin, D. Barrado y Navascues +1
We present the status of an ongoing study to built a a high resolution near infrared Echelle spectrograph (NAHUAL) for the 10.4-m-Gran Telescopio Canarias (GTC) which will be espec…
High-Resolution Spectroscopy of the Planetary Host HD 13189: Highly-Evolved and Metal-Poor
Simon C. Schuler, James H. Kim, Michael C. Tinker +3
We report on the abundances of 13 elements in the planetary host HD 13189, a massive giant star. Abundances are found to be sub-solar, with [Fe/H] = -0.58 +/- 0.04$; HD 13189 is on…
New brown dwarf companions to dM(e) stars
Andreas Seifahrt, Markus Mugrauer, Manuela Wiese +2
We present new astrometric and spectroscopic data to confirm two new M/L dwarf systems, G124-62 and LHS5166, and discuss the nature of a third system (LP261-75). Age and thus mass…