Can evidence for cosmological accretion be observed in the Hα emission from galaxies at z ~ 2? L. Le Tiran, M. D. Lehnert, P. Di Matteo, N. P. H. Nesvadba and W. van Driel A&A, 530 (2011) L6 Published online: 05 May 2011 DOI: 10.1051/0004-6361/201116568