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6 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…
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…
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…
Low-mass companions to Hyades stars
E. W. Guenther, D. B. Paulson, W. D. Cochran +3
It is now well established that a large fraction of the low-mass stars are binaries or higher order multiples. Similarly a sizable fraction have giant planets. In contrast to these…
A substellar companion around the intermediate-mass giant star HD 11977
J. Setiawan, J. Rodmann, L. da Silva +6
We report the discovery of a substellar companion to the intermediate-mass star HD 11977 (G5 III). Radial velocities of this star have been monitored for five years with FEROS at t…
The young, active binary star EK Draconis
B. König, E. W. Guenther, J. Woitas +1
EK Dra (HD 129333) is a young, active, nearby star that is orbited by a low mass companion. By combining new speckle observations with old and new radial velocity measurements we f…