Search for low-mass PMS companions around X-ray selected late B stars
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 6.5m and 17.3m and angular separations ranging from 0.12 arcsec to 14.1 arcsec (18-2358 AU). Based on observations obtained at the European Southern Observatory, La Silla, Chile (ESO programme No.~62.I-0477, and Swiss 70~cm photometric telescope).
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 2001
- DOI:
- 10.1051/0004-6361:20010452
- arXiv:
- arXiv:astro-ph/0103201
- Bibcode:
- 2001A&A...372..152H
- Keywords:
-
- STARS: BINARIES: VISUAL;
- STARS: EARLY TYPE;
- STARS: PRE-MAIN-SEQUENCE;
- X-RAYS: STARS;
- Astrophysics
- E-Print:
- Accepted for publication in Astronomy and Astrophysics