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Unformatted text preview: 30 kg), calculate the Schwarzschild radius in both meters (m) and kilometers (km). Note that 1 km equals 1000 meters. b) Some quasars appear, from their luminosities, to be active galactic nuclei with central black holes of mass one hundred million (10 8 ) times that of the Sun. Calculate the Schwarzschild radius of these black holes. Give your answer in both meters and Astronomical Units (recall, the EarthSun distance of 1 AU = 1 . 5 10 11 meters). (c) What would be the typical timescale for ux variability of this 10 8 M black hole, assuming the usual argument about the time for light to travel from opposite sides? That is, evaluate the time (in seconds) it takes for light to cross the black holes diameter ( c = 3 10 8 m/s). 1...
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This note was uploaded on 04/09/2008 for the course ASTR 2010 taught by Professor Shull during the Fall '08 term at Colorado.
 Fall '08
 SHULL
 Cosmology

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