Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-12-19
Astronomy and Astrophysics
Astrophysics
Cool Stars XV conference. to appear in proceedings of Cool Stars XV Conference
Scientific paper
10.1063/1.3099171
The Canada-France Brown Dwarf Survey is a wide eld survey for cool brown dwarfs conducted with the MegaCam camera on the CFHT telescope. Our objectives are to nd ultracool brown dwarfs and to constrain the eld brown dwarf mass function from a large and homogeneous sample of L and T dwarfs. We identify candidates in CFHT/Megacam i' and z' images and follow them up with pointed NIR imaging on several telescopes. Our survey has to date found 50 T dwarfs candidates and 170 L or late M dwarf candidates drawn from a larger sample of 1300 candidates with typical ultracool dwarfs i'-z' colours, found in 900 square degrees. We currently have completed the NIR follow-up on a large part of the survey for all candidates from the latest T dwarfs known to the late L color range. This allows us to build on a complete and well de ned sample of ultracool dwarfs to investigate the luminosity function of eld L and T dwarfs.
Albert Loic
Artigau Étienne
Delfosse Xavier
Delorme Patrick
Forveille Thierry
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