A&A 422, 631-636 (2004)
High resolution spectroscopy of brown dwarfs in Taurus
Detection of accretion in KPNO-Tau-3D. Barrado y Navascués
Laboratorio de Astrofísica Espacial y Física Fundamental, INTA, PO Box 50727, 2808 Madrid, Spain
(Received 3 February 2004 / Accepted 11 March 2004)
We present high resolution optical spectroscopy of three candidate members of the Taurus-Auriga star forming region. Based on the spectral type, the strength, profile and width of the H line, the detected lithium at 6708 Å, the location of these objects in the H-R diagram and the comparison with similar objects belonging to young stellar associations, we determine that they are bona fide members of the SFR with ages of ~3 Myr, and have masses at or below the substellar limit. At least in one case, there is active accretion from a circum(sub)stellar disk. This result suggests that high mass brown dwarfs go through a classical T Tauri phase and form, as stars do, from the collapse and fragmentation of a molecular cloud.
Key words: open clusters and associations: individual: Taurus -- stars: brown dwarfs
© ESO 2004