Volume 439, Number 2, August IV 2005
|Page(s)||L19 - L22|
|Published online||29 July 2005|
Letter to the Editor
Discovery of a widely separated binary system of very low mass stars
Institute of Astronomy and Astrophysics, Academia Sinica, PO Box 23-141, Taipei 106, ROC, Taiwan e-mail: email@example.com
2 Instituto de Astrofísica de Canarias, C/ vía Láctea s/n, 38200 La Laguna (Tenerife), Spain
3 University of Central Florida, Dept. of Physics, PO Box 162385, Orlando, FL 32816-2385, USA
4 CNRS UMR6091, Observatoire de Besançon, BP 1615, 25010 Besançon Cedex, France
5 Canada-France-Hawaii Telescope Corporation, 65-1238 Mamalahoa Highway, Kamuela, HI 96743, USA
6 Laboratoire d'Astrophysique de Grenoble, Université J. Fourier, BP 53, 38041 Grenoble, France
Accepted: 3 July 2005
We report our discovery of a nearby wide binary system, LP 714-37 AB. Phan-Bao et al. identified LP 714-37 as a mid-M dwarf during a cross-identification of the NLTT and DENIS catalogues. Our CCD images resolve the system into a binary with a projected angular separation of 1.8´´, or 33 AU, and low-resolution optical spectra give spectral types of M5.5 (LP 714-37A) and M7.5 (LP 714-37B). This makes LP 714-37 AB one of very few widely separated (separation >30 AU) very low-mass binary systems known in the field, and we discuss it in the context of the multiplicity properties of very low-mass stars and brown dwarfs.
Key words: binary stars / very low mass stars, brown dwarfs / individual star: DENIS-P J0410-1251, LP 714-37
© ESO, 2005
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