Extended Data Figure 3: Periodograms of simulated data.
From: A hot Jupiter orbiting a 2-million-year-old solar-mass T Tauri star
a, Same as Fig. 3, for simulated data computed using the brightness map, differential rotation and planet parameters inferred from the real data, and assuming the same coverage and similar S/N (equal for all LSD profiles). As for our observations, the planet signal is detected at a confidence level >99.9% in the filtered radial velocities despite being invisible in the raw radial velocities, and the planet parameters are well recovered. The periodogram of the raw radial velocities is very similar to that of Fig. 3, featuring the main peaks (at Prot and Prot/2) and their aliases; residual radial velocities mostly reflect the noise in the data. b, Same as the upper two panels of a but with no planet included in the simulation. No signal with a confidence level >90% is recovered in the filtered radial velocities, demonstrating that the filtering process is not generating spurious radial velocity signals, in particular at a period of 4.93 days.
