Radiative Efficiency of Black Holes in AGN
International Journal of Astrophysics and Space Science
Volume 1, Issue 4, October 2013, Pages: 52-55
Received: Oct. 2, 2013;
Published: Oct. 30, 2013
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Dipo Mahto, Department of Physics, Marwari College, T.M.B.U. Bhagalpur-812007, India
Rama Nand Mehta, Department of Mathematics, T.M.B.U. Bhagalpur-812007, India
Umakant Prasad, Department of Physics, T. N. B. College, T.M.B.U. Bhagalpur-812007, India
Raj Kumar Sah, Dept. of Physics, S.S.V. College, Kahalgaon, T.M.B.U. Bhagalpur-812007, India
Krishna Murari Singh, Department of Physics, Marwari College, T.M.B.U. Bhagalpur-812007, India
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Neeraj Pant et al.(2010) gave a detailed study of BCT First solution (Tewari,1988) representing time dependent balls of perfect fluid with matter-radiation in general relativity to assume the life time of quasar 107 years, initial mass≈108M with an initial linear dimension≈1015 cm are radiating energy at a constant rate i.e. L∞=1047 ergs/sec with the gravitational red shift, z=0.44637. For quasars with LQSO~1046erg/sec, the black hole masses in those systems must be at least 108 solar masses (Astro 3830: Spring 2004). In the present work, we have calculated the radiative efficiency of black holes existing in AGN by using the formula L/Mc2 (Narayan2005, Xie & Yuan 2012) and compared our results regarding some characteristics of super massive black holes with some other works given in references like Astro 3830:Spring (2004), Narayan (2005), Xie & Yuan (2012) and Chan (2013) and concluded that the mass of black holes never be greater than 5×109 M⊙ as well as the radiative efficiency of black hole is smaller than the same mass of quasars.
XRBs, Radiative Efficiency, AGN
To cite this article
Rama Nand Mehta,
Raj Kumar Sah,
Krishna Murari Singh,
Radiative Efficiency of Black Holes in AGN, International Journal of Astrophysics and Space Science.
Vol. 1, No. 4,
2013, pp. 52-55.
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