Thin accretion disks around rotating black holes in 4D Einstein–Gauss–Bonnet gravity

Abstract Recently, Kumar and Ghosh have derived Kerr-like rotating black hole solutions in the framework of four-dimensional Einstein–Gauss–Bonnet theory gravity investigated shadow. Using steady-state Novikov–Thorne model, we study thin accretion disk processes for such holes including energy flux, temperature distribution, emission spectrum, conversion efficiency as well radius innermost stable circular orbit. We also effects Gauss–Bonnet coupling parameter $$\alpha $$ α on these quantities. The results are compared to slowly relativistic Kerr which show that a positive coupling, disks around hotter more efficient than with same rotation , while negative they cooler less efficient. Thus may be considered tools testing using astrophysical observations.