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Constraining Recoiling Velocities of Black Holes Ejected by Gravitational Radiation in Galaxy Mergers
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Constraining Recoiling Velocities of Black Holes Ejected by Gravitational Radiation in Galaxy Mergers
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Recent general relativistic simulations have shown that the coalescence of two spinning black holes (BH) can lead to recoiling speeds of the BH remnant of up to thousands of km/s as a result of the gravitational radiation emission. It is important that the accretion disc remains bound to ejected BH within the region where the gas orbital velocity is larger than the ejection speed. We considered the situation when the recoiling kick radius coincides with the radius of the broad line region (BLR). We show that in this situation the observed polarization data of accretion disk emission allow to determine the value of the recoil velocity. We present the estimates of the kick velocity for AGN with determined polarization data.
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