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What Does a Black Hole Look Like?$
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Charles D. Bailyn

Print publication date: 2014

Print ISBN-13: 9780691148823

Published to Princeton Scholarship Online: October 2017

DOI: 10.23943/princeton/9780691148823.001.0001

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Black Hole Spin

Black Hole Spin

Chapter:
(p.135) 8 Black Hole Spin
Source:
What Does a Black Hole Look Like?
Author(s):

Charles D. Bailyn

Publisher:
Princeton University Press
DOI:10.23943/princeton/9780691148823.003.0008

This chapter examines the spin of a black hole. The spin is usually described as a nondimensional parameter, which can range from zero (a nonspinning black hole) to one (a situation described as “maximally spinning”). The differences in space-time between a nonspinning Schwarzschild black hole and a Kerr black hole of the same mass have potentially observable effects. The most obvious of these differences is the position of the innermost stable circular orbit (ISCO), which has a significant effect on the inner edge of an accretion disk. It is through determination of the physical size of the ISCO that the spins of black holes are determined.

Keywords:   black holes, nonspinning black hole, spinning black hole, Schwarzschild black hole, Kerr black hole, innermost stable circular orbit, accretion disk

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