Masses and age of the chemically peculiar double-lined binary χ Lupi J.-B. Le Bouquin, H. Beust, G. Duvert, J. P. Berger, F. Ménard and G. Zins A&A, 551 (2013) A121 Published online: 06 March 2013 DOI: 10.1051/0004-6361/201220454