Discovery of a nearby M9 dwarf

N. Phan-Bao , M. S. Bessell , E. L. Martín , Grégory Simon (1) , J. Guibert (1) , T. Forveille (2) , X. Delfosse (2) , F. Crifo (1) , N. Epchtein (3) , P. Wood , F. Tajahmady

1 GEPI - Galaxies, Etoiles, Physique, Instrumentation
2 LAOG - Laboratoire d'Astrophysique de Grenoble
3 FIZEAU - Laboratoire Hippolyte Fizeau

We report the discovery of a new M9.0 dwarf at only 8.2 pc, which we identified in our search for nearby ultracool dwarf (I-J>= 3.0, later than M8.0) in the DENIS data base. We measure a very high proper motion of 2.5arcsecyr-1. The PC3 index measured from its low-resolution spectrum gives a spectrophotometric distance of 8.2 pc. This makes it the third closest M9.0 dwarf.

Mots clés: stars; low-mass; brown dwarfs -stars; individual; DENIS 0334-49 -stars; LEHPM 3396

Domaines: Planète et Univers [physics]

N. Phan-Bao, M. S. Bessell, E. L. Martín, Grégory Simon, J. Guibert, et al.. Discovery of a nearby M9 dwarf. Monthly Notices of the Royal Astronomical Society, 2006, 366, pp.L40-L43. ⟨10.1111/j.1745-3933.2005.00128.x⟩. ⟨hal-00398211⟩