Collisions of oppositely charged black holes
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Collisions of oppositely charged black holes. / Zilhao, Miguel; Cardoso, Vitor; Herdeiro, Carlos; Lehner, Luis; Sperhake, Ulrich.
I: Physical Review D, Bind 89, Nr. 4, 044008, 11.02.2014.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Collisions of oppositely charged black holes
AU - Zilhao, Miguel
AU - Cardoso, Vitor
AU - Herdeiro, Carlos
AU - Lehner, Luis
AU - Sperhake, Ulrich
PY - 2014/2/11
Y1 - 2014/2/11
N2 - The first fully nonlinear numerical simulations of colliding charged black holes in D = 4 Einstein-Maxwell theory were recently reported [Zilhao et al., Phys. Rev. D 85, 124062 (2012)]. These collisions were performed for black holes with equal charge-to-mass ratio, for which initial data can be found in closed analytic form. Here we generalize the study of collisions of charged black holes to the case of unequal charge-to-mass ratios. We focus on oppositely charged black holes, as to maximize acceleration-dependent effects. As vertical bar Q vertical bar/M increases from 0 to 0.99, we observe that the gravitational radiation emitted increases by a factor of similar to 2.7; the electromagnetic radiation emission becomes dominant for vertical bar Q vertical bar/M greater than or similar to 0.37 and at vertical bar Q vertical bar/M = 0.99 is larger, by a factor of similar to 5.8, than its gravitational counterpart. We observe that these numerical results exhibit a precise and simple scaling with the charge. Furthermore, we show that the results from the numerical simulations are qualitatively captured by a simple analytic model that computes the electromagnetic dipolar radiation and the gravitational quadrupolar radiation of two nonrelativistic interacting particles in Minkowski spacetime.
AB - The first fully nonlinear numerical simulations of colliding charged black holes in D = 4 Einstein-Maxwell theory were recently reported [Zilhao et al., Phys. Rev. D 85, 124062 (2012)]. These collisions were performed for black holes with equal charge-to-mass ratio, for which initial data can be found in closed analytic form. Here we generalize the study of collisions of charged black holes to the case of unequal charge-to-mass ratios. We focus on oppositely charged black holes, as to maximize acceleration-dependent effects. As vertical bar Q vertical bar/M increases from 0 to 0.99, we observe that the gravitational radiation emitted increases by a factor of similar to 2.7; the electromagnetic radiation emission becomes dominant for vertical bar Q vertical bar/M greater than or similar to 0.37 and at vertical bar Q vertical bar/M = 0.99 is larger, by a factor of similar to 5.8, than its gravitational counterpart. We observe that these numerical results exhibit a precise and simple scaling with the charge. Furthermore, we show that the results from the numerical simulations are qualitatively captured by a simple analytic model that computes the electromagnetic dipolar radiation and the gravitational quadrupolar radiation of two nonrelativistic interacting particles in Minkowski spacetime.
KW - GRAVITATIONAL-RADIATION
KW - ENERGY
U2 - 10.1103/PhysRevD.89.044008
DO - 10.1103/PhysRevD.89.044008
M3 - Journal article
VL - 89
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 4
M1 - 044008
ER -
ID: 300078139