Asymmetries on red giant branch surfaces from CHARA/MIRC optical interferometry A. Chiavassa, R. Norris, M. Montargès, R. Ligi, L. Fossati, L. Bigot, F. Baron, P. Kervella, J. D. Monnier, D. Mourard et al. (7 more) A&A, 600 (2017) L2 Published online: 20 March 2017 DOI: 10.1051/0004-6361/201730438