EPJ Web of Conferences
Volume 47, 2013Hot Planets and Cool Stars
|Number of page(s)||4|
|Section||Direct Detection of Planets|
|Published online||25 April 2013|
A wide planetary-mass companion to a young M3 star of the AB Dor moving group
Département de physique and Observatoire du Mont-Mégantic, Université de Montréal, Montréal, QC H3C 3J7, Canada
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We present a planetary-mass companion found 42′′ (2000 AU) from a M3 star, candidate member of the young (50-120 Myr) AB Doradus moving group. It was identified through an ongoing survey with GMOS at Gemini-South, via its distinctively red i-z color (>3.51). The comoving status of this object was confirmed by 2 epochs of WIRCam/CFHT J-band images. The NIR photometry and WISE colors suggest an early-to-mid T bound companion. A NIR spectrum, taken with GNIRS at Gemini-North, confirms a mid-T spectral type. With an estimated temperature between 900 K and 1200 K, models predict a mass between 7 and 12 MJup for this object. The benchmark character of this planetary-mass object lies in its relatively well-constrained age and in its very wide separation, that allows in-depth studies that can help validating models and understanding similar but closer-in companions such as the ones that will be uncovered by next-generation planet finders (e.g. GPI and SPHERE).
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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