Search Publications
Flare stars in the TW Hydrae association: the HIP 57269 syste
Neuhäuser, R.; Guenther, E. W.; Hambaryan, V. +1 more
We discuss a new member candidate of the TW Hydrae association (TWA) among the stars of the Gershberg et al. ( te{gershberg}) flare star catalog. TWA is one of the closest known associations of young stars at about 60 pc. Three supposedly young flare stars are located in the same region of the sky as TWA. One of them (
Calculated atmospheric color refraction and observed stellar positions
Langhans, R.; Malyuto, V.; Potthoff, H.
Astrometric observations at different zenith distances have been performed in Dresden in an area centered at NGC 6791 where there are some stars with reliable color information (widely dispersed spectral types in the MK system and color indices BT-VT) as well as with accurate positions from Tycho-2 catalog. The results are us…
Variability of the He I λ5876 Å line in early type chemically peculiar stars. II
Leone, F.; Catanzaro, G.
To try to understand the behavior of helium variability in Chemically Peculiar stars, we continued our on-going observational campaign started by \cite{catanzaro99}. In this paper we present a new set of time resolved spectroscopic observations of the He I 5876 Å line for a sample of 10 stars in the spectral range B3 - A2 and characterized by diff…