Giant Planet Companion to 2MASSW J1207334-393254

Details Giant Planet Companion to 2MASSW J1207334-393254 Giant Planet Companion to 2MASSW J1207334-393254

2005-04-29

arxiv.org/abs/astro-ph/0504659v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures. accepted in Astronomy & Astrophysics

Scientific paper

10.1051/0004-6361:200500116

We report new VLT/NACO imaging observations of the young, nearby brown dwarf 2MASSW J1207334-393254 and its suggested planetary mass companion (2M1207 b). Three epochs of VLT/NACO measurements obtained over nearly one year show that the planetary mass companion candidate shares the same proper motion and, with a high confidence level, is not a stationary background object. This result confirms the status of 2M1207 b as of planetary mass (5 times the mass of Jupiter) and the first image of a planetary mass companion in a different system than our own. This discovery offers new perspectives for our understanding of chemical and physical properties of planetary mass objects as well as their mechanisms of formation.

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