2007/10/31 by Rafael A. Porto · 1 citation
Physics and Astronomy · #Absorption (acoustics) #Absorption cross section #Astrophysical Phenomena and Observations #Black Holes and Theoretical Physics #Black hole (networking) #Classical mechanics #Cross section (physics) #Degrees of freedom (physics and chemistry) #Dissipative system #Gravitation #Graviton #Optics #Physics #Pulsars and Gravitational Waves Research #Quantum electrodynamics #Quantum mechanics #Scattering #Spacetime #Spin (aerodynamics) #Spin-flip #Superradiance #gr-qc #hep-th
paper · pdf · doi:10.1103/physrevd.77.064026
published as Phys.Rev.D77:064026,2008 · 17 pages, 2 figures. v2 Typos and misprints fixed
openalex publication_date 2008/03/24 · arxiv created 2012/01/18 · arxiv updated 2012/01/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We generalize the effective point particle approach to black hole dynamics to include spin. In this approach, dissipative effects are captured by degrees of freedom localized on the worldline. The absorptive properties of the black hole are determined by correlation functions which can be matched with the graviton absorption cross section in the long wavelength approximation. For rotating black holes, superradiance is responsible for the leading contribution. The effective theory is then used to predict the power loss due to spin in the dynamics of nonrelativistic binary systems. An enhancement of three powers of the relative velocity is found with respect to the nonrotating case. Then we generalize the results to other types of constituents in the binary system, such as rotating neutron stars. Finally, we compute the power loss absorbed by a test spinning black hole in a given spacetime background.