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Fig. 2

image

Period-magnitude (top) and period-color (bottom) diagrams of the periodic variable candidates of NGC 3766 brighter than 15.5 mag. The photometric periods Pphot and apparent magnitudes are taken from Paper I. The projected stellar rotational velocities derived in this work are color-coded according to the color-scales on the right of the diagrams, or are in black when no spectrum is available. SPB candidates are marked with diamonds, the new variability class candidates (including FaRPB stars) with circles, δ Scuti stars with upward triangles, and γ Dor stars with downward triangles. The unique hybrid SPB/FaRPB star is marked with squares. Photometric periods resulting from orbital motion in a binary system are plotted with plus sign (SB1-type binary) or cross (SB2-type binary) signs. Solid vertical lines link periods within each multiperiodic star, with the second and third periods drawn with smaller indicators. A dashed line is added at Pphot = 0.55 d as a guide for the eye. New variability class candidates with periods greater than this limit are labeled with their star IDs next to the indicators, the four stars in binary systems being labeled in bold italic.

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