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Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2006

Five new very low mass binaries

D. Ségransan
  • Fonction : Auteur
J.-L. Beuzit
T. Forveille
P. Delorme
S. Udry
M. Mayor
  • Fonction : Auteur
G. Chauvin
T. Fusco
  • Fonction : Auteur
P. Gigan
  • Fonction : Auteur

Résumé

We report the discovery of companions to 5 nearby late M dwarfs (>M5), LHS1901, LHS4009, LHS6167, LP869-26 and WT460, and we confirm that the recently discovered mid-T brown dwarf companion to SCR1845-6357 is physically bound to that star. These discoveries result from our adaptive optics survey of all M dwarfs within 12 pc. The new companions have spectral types M5 to L1, and orbital separations between 1 and 10 AU. They add significantly to the number of late M dwarfs binaries in the immediate solar neighbourhood, and will improve the multiplicity statistics of late M dwarfs. The expected periods range from 3 to 130 years. Several pairs thus have good potential for accurate mass determination in this poorly sampled mass range.

Dates et versions

hal-00398286 , version 1 (24-06-2009)

Identifiants

Citer

G. Montagnier, D. Ségransan, J.-L. Beuzit, T. Forveille, P. Delorme, et al.. Five new very low mass binaries. Astronomy and Astrophysics - A&A, 2006, 460, pp.L19. ⟨10.1051/0004-6361:20066120⟩. ⟨hal-00398286⟩
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