TY - JOUR
T1 - Hidden momentum and black hole kicks
AU - Gralla, Samuel E.
AU - Herrmann, Frank
PY - 2013/10/21
Y1 - 2013/10/21
N2 - A stationary magnetic dipole immersed in an electric field carries 'hidden' mechanical momentum. However, the fate of this momentum if the fields are turned off is unclear. We consider a charge-and-dipole hidden momentum configuration, and turn off the fields by collapsing a null shell onto the system, forming a black hole. In numerical calculations we find that the black hole receives a kick corresponding to 0.1% of the initial stored momentum. When extrapolated to apply to purely gravitational phenomena, this efficiency suggests a role for the hidden momentum kick mechanism in generating the binary black hole 'superkicks' observed in numerical simulations of Einstein's equation.
AB - A stationary magnetic dipole immersed in an electric field carries 'hidden' mechanical momentum. However, the fate of this momentum if the fields are turned off is unclear. We consider a charge-and-dipole hidden momentum configuration, and turn off the fields by collapsing a null shell onto the system, forming a black hole. In numerical calculations we find that the black hole receives a kick corresponding to 0.1% of the initial stored momentum. When extrapolated to apply to purely gravitational phenomena, this efficiency suggests a role for the hidden momentum kick mechanism in generating the binary black hole 'superkicks' observed in numerical simulations of Einstein's equation.
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U2 - 10.1088/0264-9381/30/20/205009
DO - 10.1088/0264-9381/30/20/205009
M3 - Article
AN - SCOPUS:84886940229
VL - 30
JO - Classical and Quantum Gravity
JF - Classical and Quantum Gravity
SN - 0264-9381
IS - 20
M1 - 205009
ER -