A critical reassessment of the fundamental properties of GJ 504: chemical composition and age V. D’Orazi, S. Desidera, R. G. Gratton, A. F. Lanza, S. Messina, S. M. Andrievsky, S. Korotin, S. Benatti, M. Bonnefoy, E. Covino and M. Janson A&A, 598 (2017) A19 Published online: 25 January 2017 DOI: 10.1051/0004-6361/201629283