Radiative characteristics of accretion disks around rotating regular black holes

Our research focuses on examining the characteristics of thin accretion disks encircling rotating regular black holes. In this study, we investigate the important features of accretion disks surrounding Bardeen's regular black holes, which play a crucial role in addressing the singularity issue. The horizon configuration of rotating Bardeen black holes is analyzed in details, as well as the innermost stable circular orbits related to this spacetime. The primary goal is to derive quantitively the radiative flux, differential and spectral luminosities of the accretion disk. Within the specified gravitational field, particularly, by taking the parameter r(0)* > 0 and fixing the j = 0.2, our findings show that the corresponding accretion disk's luminosity exceeds that one predicted by the Kerr metric at identical value of spin parameter (j=0.2). Making the juxta position of Bardeen's black hole parameter r(0)* with the spin parameter j of the Kerr black hole we reveal that the spacetime corresponding to the non-rotating Bardeen black holes, in some certain cases, can imitate the Kerr spacetime.