Abstract
We present a planetary-mass companion found 42 �� (2000AU) from a M3 star, candidate member of the young (50-120Myr) 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 900K and 1200K, models predict a mass between 7 and 12MJup 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).
Highlights
In the last years, planetary-mass objects were discovered in the Sun’s neighborhood through direct imaging, thanks to new powerful high-contrast imaging techniques
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)
Summary
Planetary-mass objects were discovered in the Sun’s neighborhood through direct imaging, thanks to new powerful high-contrast imaging techniques. [1] identified many new low-mass members of young local associations ( Pictoris and AB Doradus moving group, as well as TW Hydrae, Tucana-Horologium, Columba, Carina and Argus associations). To do so, they used a novel Bayesian analysis that allows, for a star with given photometric (I and J magnitudes) and astrometric ( cos , , RA, DEC) characteristics, to evaluate the membership probability to an association. The reader is referred to [1] for more details
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
