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We introduce the BEBOP radial velocity survey for circumbinary planets. Weinitiated this survey using the CORALIE spectrograph on the Swiss EulerTelescope at La Silla, Chile. An intensive four year observing campaigncommenced in 2013, targeting 47 single-lined eclipsing binaries drawn from theEBLM survey for low mass eclipsing binaries. Our specific use of binaries withfaint M dwarf companions avoids spectral contamination, providing observingconditions akin to single stars. By combining new BEBOP observations withexisting ones from the EBLM programme, we report on the results of 1519 radialvelocity measurements over timespans as long as eight years. For the besttargets we are sensitive to planets down to 0.1 Jupiter masses, and our mediansensitivity is 0.4 Jupiter masses. In this initial survey we do not detect anyplanetary mass companions. Nonetheless, we present the first constraints on theabundance of circumbinary companions, as a function of mass and period. Acomparison of our results to Kepler's detections indicates a dispersion ofplanetary orbital inclinations less than ~10 degrees.

astronomy and astrophysics

The BEBOP radial-velocity survey for circumbinary planets I. Eight years  of CORALIE observations of 47 single-line eclipsing binaries and abundance  constraints on the masses of circumbinary planets