Circumbinary disk simulation for a model matching the parameters of Kepler 34, from Pelupessy & Portegies Zwart (2013). Shown is the distribution of gas in the semi-major axis – eccentricity plane with the orbital parameters of the observed planet around Kepler 34 as the blue dot (with the range of semi-major axis and eccentricity encountered during long term integrations given by the error bars). The stability of planetary orbits is indicated by the red crosses and plusses, where these indicate the unstable models from a grid of models calculated with AMUSE.