The Trigonometric Parallax of the Brown Dwarf Planetary System 2MASSW J1207334-393254

Details The Trigonometric Parallax of the Brown Dwarf Planetary System 2MASSW J1207334-393254 The Trigonometric Parallax of the Brown Dwarf Planetary System 2MASSW J1207334-393254

2007-09-08

arxiv.org/abs/0709.1178v1

Astronomy and Astrophysics

Astrophysics

Accepted to the Astrophysical Journal Letters

Scientific paper

10.1086/523271

We have measured a trigonometric parallax to the young brown dwarf 2MASSW J1207334-393254. The distance [54.0 (+3.2,-2.8) pc] and space motion confirm membership in the TW Hydrae Association. The primary is a ~25 M_jup brown dwarf. We discuss the "planetary mass" secondary, which is certainly below the deuterium-burning limit but whose colors and absolute magnitudes pose challenges to our current understanding of planetary-mass objects.

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