LP 349-25: A new tight M8V binary

Free access article

Issue		A&A Volume 435, Number 1, May III 2005


Page(s)		L5 - L8
Section		Letters
DOI		http://dx.doi.org/10.1051/0004-6361:200500101

A&A 435, L5-L8 (2005)
DOI: 10.1051/0004-6361:200500101

Letter

LP 349-25: A new tight M8V binary

T. Forveille^{1, 2}, J.-L. Beuzit², P. Delorme^{1, 2}, D. Ségransan³, X. Delfosse², G. Chauvin⁴, T. Fusco⁵, A.-M. Lagrange², M. Mayor³, G. Montagnier², D. Mouillet⁶, C. Perrier², S. Udry³, J. Charton², P. Gigan⁷, J.-M. Conan⁵, P. Kern² and G. Michet⁷

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.

Key words: stars: binaries: visual -- stars: individual: LP 349-25 -- stars: low-mass, brown dwarfs

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