Mergers trigger active galactic nuclei out to z ∼ 0.6 F. Gao, L. Wang, W. J. Pearson, Y. A. Gordon, B. W. Holwerda, A. M. Hopkins, M. J. I. Brown, J. Bland-Hawthorn and M. S. Owers A&A, 637 (2020) A94 Published online: 27 May 2020 DOI: 10.1051/0004-6361/201937178