| Issue |
A&A
Volume 372, Number 1, June II 2001
|
|
|---|---|---|
| Page(s) | 152 - 164 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20010452 | |
| Published online | 15 June 2001 | |
Search for low-mass PMS companions around X-ray selected late B stars*
1
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, This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
20
September
2000
Accepted:
15
March
2001
Abstract
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 6
5 and 173 and angular separations ranging from
0
2 to 141 (18-2358 AU).
Key words: stars: binaries: visual / stars: early type / stars: pre-main-sequence / X-rays: stars
Based on observations obtained at the European Southern Observatory, La Silla, Chile (ESO programme No. 62.I-0477, and Swiss 70 cm photometric telescope).
© ESO, 2001
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