Note on the effect of a massive accretion disk in the measurements of black hole spins

  title={Note on the effect of a massive accretion disk in the measurements of black hole spins},
  author={Cosimo Bambi and Daniele Malafarina and Naoki Tsukamoto},
  journal={Physical Review D},
The spin measurement of black holes has important implications in physics and astrophysics. Regardless of the specific technique to estimate the black hole spin, all the current approaches assume that the space-time geometry around the compact object is exactly described by the Kerr solution. This is clearly an approximation, because the Kerr metric is a stationary solution of the vacuum Einstein equations. In this paper, we estimate the effect of a massive accretion disk in the measurement of… 

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