HRD and the LDB for Alpha Persei. Left: symbols are as follows: green solid circles are lithium-rich sources and magenta triangles lithium-poor ones, both from our LDB sample; empty large broken black circles are suspected multiple systems; over-imposed big black crosses are sources discarded as members after this work; and grey points are known members from Gaia Collaboration (2018b). Thin blue lines correspond to isochrones of 1, 10, 100 Ma, and 1 Ga from the BT-Settl models (Allard et al. 2013), while the thick blue one to 80 Ma. The figure also includes 70 Ma isochrones from: D’Antona & Mazzitelli (1994; black dashed line), Tognelli et al. (2011; orange dashed dot line), Siess et al. (2000; red dotted line), and a Zero Age Main Sequence from Stahler & Palla (2005; the green solid line). Right: zoom on the left plot. A black horizontal line marks the L_{bol LDB}, together with the 16th and 84th percentiles (dotted lines). Alpha Persei is Ma old using the BT-Settl bolometric luminosity-age relationship (Allard et al. 2012). For clarity, members from Gaia Collaboration (2018b) are not shown.