Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-02-15
Astronomy and Astrophysics
Astrophysics
in: IAU Symposium 202 held Aug 2000 in Manchester, UK (ed. Penny A.J., Artymowicz P., Lagrange A.-M., Russell S.S.)
Scientific paper
We report first results from our ground-based infrared imaging search for sub-stellar companions (brown dwarfs and giant planets) of young (up to 100 Myrs) nearby (up to 100 pc) stars, where companions should be well separated from the central stars and still relatively bright due to ongoing accretion and/or contraction. Our observations are performed mainly with SOFI and SHARP at the ESO 3.5m NTT on La Silla (imaging) and with ISAAC at the ESO 8.2m Antu (VLT-UT1) on Cerro Paranal (imaging and spectroscopy), all in the H- and K-bands. Here, we present new companion candidates around three T Tauri stars (TWA-8 A, RXJ1121.1-3845, and RXJ1121.3-3447 N) in the TW Hya group, which would have been sub-stellar if at the same distance and age as the T Tauri stars, but are found to be background stars by spectroscopy.
Alves J. J.
Brandner Wolfgang
Comeron Fernando
Cuby Jean Gabriel
Guenther Eike W.
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