Letter to the Editor

LP 349-25: A new tight M8V binary

¹ Canada-France-Hawaii Telescope Corporation, PO Box 1597, Kamuela, HI 96743, USA e-mail: Thierry.Forveille@cfht.hawaii.edu
² Laboratoire d'Astrophysique de Grenoble, BP 53X, 38041 Grenoble Cedex, France e-mail: [Thierry.Forveille;Jean-Luc.Beuzit;Philippe.Delorme;Xavier.Delfosse;Anne-Marie.Lagrange; Guillaume.Montagnier;Christian.Perrier;Julien.Charton;Pierre.Kern]@obs.ujf-grenoble.fr
³ Observatoire de Genève, 51 Chemin des Maillettes, 1290, Switzerland e-mail: [Damien.Segransan;Michel.Mayor;Stephane.Udry]@obs.unige.ch
⁴ European Southern Observatory, Casilla 19001, Santiago 19, Chile e-mail: gchauvin@eso.org
⁵ ONERA-DOTA, 92322 Châtillon, France e-mail: [Thierry.Fusco;Jean-Marc.Conan]@onera.fr
⁶ Laboratoire d'Astrophysique, Observatoire Midi-Pyrénées, Tarbes, France e-mail: mouillet@bagn.obs-mip.fr
⁷ Laboratoire d'Études Spatiales et d'Instrumentation en Astrophysique, 5 place Jules Janssen, 92195 Meudon Cedex, France e-mail: [Pierre.Gigan;Genevieve.Michet]@obspm.fr

Received: 7 January 2005
Accepted: 19 March 2005

Abstract

We present the discovery of a tight M8V binary, with a separation of only 1.2 astronomical units, obtained with the PUEO and NACO adaptive optics systems, respectively at the CFHT and VLT telescopes. The estimated period of LP 349-25 is approximately 5 years, and this makes it an excellent candidate for a precise mass measurement.