Volume 372, Number 1, June II 2001
|Page(s)||152 - 164|
|Section||Interstellar and circumstellar matter|
|Published online||15 June 2001|
Search for low-mass PMS companions around X-ray selected late B stars*
European Southern Observatory, Casilla 19001, Santiago 19, Chile
2 Laboratoire d'Astrophysique, Observatoire de Grenoble, BP 53, 38041 Grenoble, France
3 W. M. Keck Observatory, 65-1120 Mamalahoa Highway, Kamuela, HI 96743, USA
4 Institut d'Astronomie de l'Université de Lausanne, 1290 Chavannes-des-Bois, Switzerland
5 Landessternwarte Heidelberg-Königstuhl, 69117 Heidelberg, Germany
Corresponding author: S. Hubrig, Shubrig@eso.org
Accepted: 15 March 2001
We have observed 49 X-ray-detected bright late B-type dwarfs to search for close low-mass pre-main sequence (PMS) companions using the European Southern Observatory's ADONIS (Adaptive Optics Near Infrared System) instrument. We announce the discovery of 21 new companions in 9 binaries, 5 triple, 4 quadruple system and 1 system consisting of five stars. The detected new companions have K magnitudes between 65 and 173 and angular separations ranging from 02 to 141 (18-2358 AU).
Key words: stars: binaries: visual / stars: early type / stars: pre-main-sequence / X-rays: stars
© ESO, 2001
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