Extended Data Fig. 7: Lomb-Scargle periodograms of the WASP-South light curves of TOI-500.
From: A low-eccentricity migration pathway for a 13-h-period Earth analogue in a four-planet system
Left panels, from bottom to top: periodogram of the data acquired in 2008/2009, 2009/2010, 2010/2011, and 2011/2012. The upper left panel displays the periodogram of the combined 4 years of data, showing a possible 0.022d-1 periodic signal, corresponding to a period of about 45 d (upper panel). This peak is marked in all the panels with a red thick line. The dotted horizontal lines show the 1% false alarm probability. The right panels show the WASP-South binned photometry folded at the 45-d rotation period for the years 2008 and 2011, when the 45 d signal is stronger. The displayed phases go from 0 to 1.5, in order to visualize better the periodicity of the photometric variability. The repeated data between phase 0 and 0.25, and phase 1.25 and 1.5 are shown with gray points.
