Active galactic nuclei and gravitational redshifts N. Padilla, S. Carneiro, J. Chaves-Montero, C. J. Donzelli, C. Pigozzo, P. Colazo and J. S. Alcaniz A&A, 683 (2024) A120 Published online: 13 March 2024 DOI: 10.1051/0004-6361/202348146