Dipo Mahto

Dipo Mahto

Marwari College, Bhagalpur

Title: Energy of the spinning black holes in XRBs and AGN


He is assistant Professor in the Department of Physics, Marwari College, Bhagalpur under T.M.B.U. Bhagalpur from 2003. He has passed M. Sc. in 1990 and awarded by PhD degree in 2005 on the topic-Contribution of Mathematical Physics in the development of theory of relativity with special reference to rotating media under the supervision of Dr. Gopi Kant Jha, Former Head & Professor, University Department of Physics of L.N. Mithila University, Darbhanga, India. He is associated with some works in his college as N.S.S. Programme Officer, coordinator of Remedial Coaching & Assistant coordinator, BCA sponsored by UGC. His research work is based on relativity and Astrophysics, especially black holes. There are forty research papers credit to his name, published in repute national and international journals.


Dipo Mahto et al. gave a model for the energy of spinning black holes in terms of the radius of event horizon given by the equation using the Schwarzschild radius of spinning black holes, where is the black hole constant having the value 1.214 x 1044 Jm-1. The present paper calculates the energy of different spinning black holes existing in X-ray binaries (XRBs) and active galactic nuclei (AGN) on the basis of this model. The calculation shows that the total energy of the rest masses M ~ 5 ­ 20 Mʘ of stellar – mass black holes in X-ray binaries is ergs and for the mass M ~ 106 – 109.5 Mʘ of super massive black holes in active galactic nuclei is 1060-1064ergs. Our result agrees with the result of other research work done previously by Pacini & Salvati and by Krishan and justifies the validity of this model. The present work has been also compared with that of energy of non-spinning black holes which concludes that the energy of spinning and non-spinning black holes is independent of spin and dependent of their masses.