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


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

2004A&A...425L..29C - Astronomy and Astrophysics, volume 425, L29-32 (2004/10-2)

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

CHAUVIN G., LAGRANGE A.-M., DUMAS C., ZUCKERMAN B., MOUILLET D., SONG I., BEUZIT J.-L. and LOWRANCE P.

Abstract (from CDS):

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 ∼25MJup 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, Ks 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±2MJup and an effective temperature of Teff=1250±200K.

Abstract Copyright:

Journal keyword(s): 2MASSW J1207334-393254 - brown dwarf - giant planet - adaptive optics imaging and spectroscopy

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NAME TW Hya Association As* 11 01.9 -34 42           ~ 907 0
2 TWA 27 LM* 12 07 33.4675524840 -39 32 54.016625184     19.95 17.99 15.88 M8IVe 330 0
3 TWA 27B BD* 12 07 33.50 -39 32 54.4           L3 264 0

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2023.02.04-10:24:23

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