3 papers
astro-ph2000
Spectrum and proper motion of a brown dwarf companion of the T Tauri star CoD-33 7795
R. Neuhaeuser, E. W. Guenther, M. G. Petr +3
We present optical and infrared spectra as well as the proper motion of an H=12 mag object 2" off the ~5 mag brighter spectroscopic binary star CoD-33 7795 (=TWA-5), a member of th…
astro-ph1997
HIPPARCOS results for ROSAT-discovered young stars
Ralph Neuhaeuser, Wolfgang Brandner
Out of about 500 Lithium-rich ROSAT counterparts, which are presumed to be low-mass pre-main sequence stars, 21 stars have been observed by HIPPARCOS. We study their parallaxes, pr…
astro-ph1996
Physical Properties of 90 AU to 250 AU Pre-Main-Sequence Binaries
Wolfgang Brandner, Hans Zinnecker
We have analyzed photometric and spectroscopic data of a sample of 14 spatially resolved pre-main-sequence binaries (separations 0.6" to 1.7") in the nearby (150 pc) low-mass star-…