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Nature 451, 38-41 (3 January 2008) | doi:10.1038/nature06426; Received 6 July 2007; Accepted 18 October 2007

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A young massive planet in a star–disk system

J. Setiawan1, Th. Henning1, R. Launhardt1, A. Müller1, P. Weise1 & M. Kürster1

  1. Max-Planck-Institut für Astronomie, Heidelberg, D-69117, Germany

Correspondence to: J. Setiawan1R. Launhardt1 Correspondence and requests for materials should be addressed to J.S. (Email: setiawan@mpia.de) or R.L. (Email: rlau@mpia.de).

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There is a general consensus that planets form within disks of dust and gas around newly born stars1, 2. Details of their formation process, however, are still a matter of ongoing debate. The timescale of planet formation remains unclear, so the detection of planets around young stars with protoplanetary disks is potentially of great interest. Hitherto, no such planet has been found. Here we report the detection of a planet of mass (9.8plusminus3.3)MJupiter around TW Hydrae (TW Hya), a nearby young star with an age of only 8–10 Myr that is surrounded by a well-studied circumstellar disk. It orbits the star with a period of 3.56 days at 0.04 au, inside the inner rim of the disk. This demonstrates that planets can form within 10 Myr, before the disk has been dissipated by stellar winds and radiation.

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