A giant planet candidate near a young brown dwarf. Direct VLT/NACO observations using IR wavefront sensing

October 2004 • 2004A&A...425L..29C

Authors • Chauvin, G. • Lagrange, A. -M. • Dumas, C. • Zuckerman, B. • Mouillet, D. • Song, I. • Beuzit, J. -L. • Lowrance, P.

Abstract • We present deep VLT/NACO infrared imaging and spectroscopic observations of the brown dwarf 2MASSWJ 1207334-393254, obtained during our on-going adaptive optics survey of southern young, nearby associations. This ∼25 M_Jup brown dwarf, located ∼70 pc from Earth, has been recently identified as a member of the TW Hydrae Association (age ∼ 8 Myr). 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 ∼780 mas (∼55 AU). 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±2 M_Jup and an effective temperature of T_eff=1250±200 K.

Based on observations obtained at the Paranal Observatory, Chile, in ESO programs 73.C-0469 and 273.C-5029.

Links

• PREPRINT http://arxiv.org/abs/astro-ph/0409323
• POSTSCRIPT https://www.aanda.org/10.1051/0004-6361:200400056/postscript
• ELECTR http://www.aanda.org/htbin/resolve?bibcode=2004A%26A...425L..29CFUL
• SIMBAD http://simbad.u-strasbg.fr/simbo.pl?bibcode=2004A%26A...425L..29C
• PDF https://www.aanda.org/10.1051/0004-6361:200400056/pdf
• DATA http://archive.eso.org/bin/ads2eso?2004A%26A...425L..29C
• DATA http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?type=REFERENCE&bibcode=2004A%26A...425L..29C
• DATA https://irsa.ipac.caltech.edu/bibdata/2004/C/2004A&A...425L..29C.html
• SPIRES http://inspirehep.net/search?p=find+eprint+astro-ph/0409323