Entropy Change of Black Holes of Quarter Spin in XRBs & AGN

Abstract

This paper is concerned with the study of change in entropy of black holes of spin parameters a* = +1/4 & -1/4 for unit angular velocity ( ) for XRBs and AGN. This result that the black holes of co-rotation as well as counter rotation decreases and increases the entropy respectively and the emission of energy from BHs is predicted due to loss of mass as Hawking radiation on the basis of quantum mechanical fields.