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P. Baudoz, F. Roddier, C. Roddier, O. Guyon, D. Potter, W. Brandner (IfA), J. Gay, Y. Rabbia (Obs. Côte d'Azur), L. Close (ESO/Steward Obs.)
We present the search of substellar mass companions around nearby stars which we are pursuing at University of Hawaii. Our strategy for such survey embraces the use of two different instruments: The University of Hawaii adaptive optics curvature system Hokupa'a placed on Gemini North and the Observatoire de la Cote d'Azur Nulling Coronagraph (called AIC) which is installed on PUEO (CFHT adaptive optics). We will show how the two instruments are complementary for a substellar mass survey. Preliminary results will be shown to demonstrate that the point source detection limit with Hokupa'a on Gemini is very efficient at angular distances larger than one arcseconds (8 magnitudes in K at one arcsecond) while the point source detection limit for AIC on PUEO/CFHT is more efficient at shorter angular distances (4 magnitudes in K at 0.1 arcsecond).
This research acknowledges support by NSF, NASA and CNRS.
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The author(s) of this abstract have provided an email address for comments about the abstract: baudoz@ifa.hawaii.edu