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1

What is the Eddington luminosity of a quasar with a mass of 1 billion solar mass?
2

Suppose a quasar has a luminosity of 1012 solar luminosities. What is the smallest mass that the quasar could have and still continue to pull surrounding gas into itself?
3

The visible light from a gamma ray burst has an apparent magnitude of 8.0. The distance of the galaxy in which the burst occurred is 3000 Mpc. Find the absolute magnitude of the visible light. How does this compare with the absolute magnitude of the Sun? (Use Equation 16.3.)





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