2582 20160701171707.0 10.1007/978-3-540-74745-1_9 DOI ASTROimport-739 Lampens, P. 2008 DG Leo: A Triple System with a Surprising Variety of Physical Phenomena DG Leo consists of three late A-type stars forming a hierarchic and spectroscopic triple system. Although all components have similar age and mass, in-depth spectroscopic analysis showed that the components nevertheless behave differently with respect to pulsation and to diffusion in their outer atmospheres. Inclusion of a speckle measure shortly after periastron passage allows to obtain a much improved orbital solution as well as a reliable dynamical parallax and systemic mass. The orbital parameters also suggest a possible coplanar configuration of both pairs. This object therefore represents a first-class opportunity to investigate the link between multiplicity, chemical composition and pulsation in a coeval system. Frémat, Y. Hensberge, H. Tamazian, V. Docobo, J. A. Balega, Y. Multiple Stars Across the H-R Diagram 2008 59 http://esoads.eso.org/abs/2008msah.conf...59L published in NONREF