The luminosity of the most massive black hole yet discovered is 4.3 x1014 Lo. Assuming that this luminosity is generated by the in-fall of matter into a black hole, calculate the rate in Mo yr-1 at which matter is being accreted into this black hole. Calculate the minimum mass that this black hole must have to remain gravitationally stable
If a mass m falls on a big mass M of radius R due to
gravitational attraction ,energy released due to accretion is given
by
(GMm/R).
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