HD 45364: Periodograms of the RV time series. The three horizontal lines correspond to different levels of false alarm probability (FAP) of 10%, 1%, and 0.1% from bottom to top. Top: Periodogram of the RV time series with no Keplerian in the model. The highest peak is very significant and corresponds to a signal of period 344.03 days. Middle : Periodogram of the residuals after subtraction of that signal, modelled with a Keplerian. Another highly significant signal is detected at a period = 227.69 days. Bottom: Periodogram of the residuals after subtraction of the two-keplerian model.