Giant planet companion to 2MASSW J1207334-393254

2005/04/29 by G. Chauvin, A. -M. Lagrange, A.-M. Lagrange +7 · 7 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Brown dwarf #Celestial mechanics #Giant planet #Planet #Planetary mass #Planetary science #Planetary system #Proper motion #Stellar, planetary, and galactic studies #astro-ph

paper · pdf · doi:10.1051/0004-6361:200500116

published as Astron.Astrophys.438:L25-L28,2005 · 4 pages, 2 figures. accepted in Astronomy & Astrophysics

arxiv created 2005/04/29 · openalex publication_date 2005/07/08 · arxiv updated 2014/10/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

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.

Citations

• Measuring Fundamental Parameters of Substellar Objects. I. Surface Gravities
• Multiplicity of Nearby Free-floating Ultracool Dwarfs: AHubble Space TelescopeWFPC2 Search for Companions
• New Members of the TW Hydrae Association, β Pictoris Moving Group, and Tucana/Horologium Association
• Post–T Tauri Stars in the Nearest OB Association
• Measuring Fundamental Parameters of Substellar Objects. II. Masses and Radii
• Detection of Nine M8.0–L0.5 Binaries: The Very Low Mass Binary Population and Its Implications for Brown Dwarf and Very Low Mass Star Formation
• A Giant Planet Candidate near a Young Brown Dwarf

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