2004A&A...425L..29C

We present deep VLT/NACO infrared imaging and spectroscopic observations of the brown dwarf 2MASSW J1207334-393254, obtained during our on-going adaptive optics survey of southern young, nearby associations. This ∼25M_Jup brown dwarf, located ∼70pc from Earth, has been recently identified as a member of the TW Hydrae Association (age∼8Myr). Using adaptive optics infrared wavefront sensing to acquire sharp images of its circumstellar environment, we discovered a very faint and very red object at a close separation of ∼780mas (∼55AU). Photometry in the H, K_s and L' bands and upper limit in J-band are compatible with a spectral type L5-L9.5. Near-infrared spectroscopy is consistent with this spectral type estimate. Different evolutionary models predict an object within the planetary regime with a mass of M=5±2M_Jup and an effective temperature of T_eff=1250±200K.