Age–vertical velocity dispersion relation at the Solar position. Red diamonds: Gómez et al. (1997) from Hipparcos. Yellow triangles: Yu & Liu (2018) from LAMOST red giants with [Fe/H] > −0.2. Pink squares: Soubiran et al. (2008) from red clump giants. Cyan triangles: Thin disc population from Lagarde et al. (2021) with ages from Miglio et al. (2021)(M21). Dark grey triangles: Thin disc population from Lagarde et al. (2021) with ages from APOKASC (Pinsonneault et al. 2018). Green dashed line: Relation from the model of Bovy et al. (2012). Magenta dotted line: Relation from Sharma et al. (2021). Blue filled circles: This study.