e − P diagram for SB1 systems along the giant branch, filtered according to significance factors larger than 40, for various radius spans. Top panel: is the full sample. The solid black lines correspond to the loci where P(1 − e)³ is constant (see text). The sample sizes are, from top to bottom, 1960, 2358, 1643, 737, and 40. The location in the HRD of the SB1 systems with 0.7 < log(R/R_⊙)≤1.0 (second panel from top), 1.3 < log(R/R_⊙)≤1.6 (fourth panel from top) and 1.9 < log(R/R_⊙) (bottom panel) is shown in Fig. 25.