Distributions of outer orbital eccentricities. Top panel: differential probability distribution of the outer orbit eccentricities for our newly identified hierarchical triple star candidates. Different colors represent different types of Gaia NSS orbital solutions. The magenta line shows the analytical function described in Eq. (1). Bottom panel: cumulative eccentricity distributions. Green – OGLE; blue – Kepler; red – Gaia (this study); purple – dN/de = constant; black – a so-called thermal distribution with dN/de ∝ e.