Intensity contrast from MHD simulations and HINODE observations N. Afram, Y. C. Unruh, S. K. Solanki, M. Schüssler, A. Lagg and A. Vögler A&A, 526 (2011) A120 Published online: 10 January 2011 DOI: 10.1051/0004-6361/201015582