Images in NHα (left), with a fake planet (FP) injected at the flux of AB Aur b (middle) and with twice the flux (right). Labels indicate the position of the candidate planet. The dashed circles trace the region contaminated by the AO correction radius, while the pink cross represents the companion candidate reported in Kozdon et al. (2026) in ¹²CO ro-vibrational transitions. The yellow circle at ρ = 0.35″, PA = 119.7° marks a new signal that remains to be investigated.