Detection limits. Top panel: semi-amplitude k_p versus period P_orb for our detection limits based on injection and recovery tests. The white region shows the signals that we would detect in a periodogram with 1 % FAP. The blue region shows signals we would detect with a FAP lower than 1 % FAP. With the current dataset and activity model, we would miss the red region signals. The top grey dashed line shows the maximum semi-amplitudes that would still be compatible with the data. The bottom grey dashed line shows the minimum amplitude that we expect to detect with ESPRESSO data and the current exposure times. The green solid circle shows the confirmed planet and the orange circles show the position of the candidate planets. Bottom panel: same as top panel but in mass versus period.