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We present preliminary results of the first and on-going radial velocitysurvey for circumbinary planets. With a novel radial velocity techniqueemploying an iodine absorption cell we achieve an unprecedented RV precision ofup to 2 m/s for double-lined binary stars. The high resolution spectracollected with the Keck I/Hires, TNG/Sarg and Shane/CAT/Hamspectelescopes/spectrographs over the years 2003-2008 allow us to derive RVs andcompute planet detection limits for ten double-lined binary stars. For thisinitial sample of targets, we can rule out planets on dynamically stable orbitswith masses as small as ~0.3 to 3 MJup for the orbital periods of up to ~5.3years. Even though the presented sample of stars is too small to make anystrong conclusions, it is clear that the search for circumbinary planets is nowtechnique-wise possible and eventually will provide new constraints for theplanet formation theories.

astrophysical journal/the astrophysical journal

The Radial Velocity TATOOINE Search for Circumbinary Planets: Planet  Detection Limits for a Sample of Double-lined Binary Stars - Initial Results  from Keck I/Hires, Shane/CAT/Hamspec and TNG/Sarg Observations