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A Tale of Two Black Holes: Multiband Gravitational-Wave Measurement of Recoil Kicks

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arxiv 2406.11926 v1 pith:DH3GHVF2 submitted 2024-06-17 gr-qc astro-ph.HE

Shobhit Ranjan , Karan Jani , Alexander H. Nitz , Kelly Holley-Bockelmann , Curt Cutler This is my paper · ORCID
classification gr-qcastro-ph.HE
keywords blackkickholegravitational-wavemeasurementmultibandnetworkastrophysical
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The non-linear dynamics of General Relativity leave their imprint on remnants of black hole mergers in the form of a recoil ``kick''. The kick has profound astrophysical implications across the black hole mass range from stellar to super-massive. However, a robust measurement of the kick for generic binaries from gravitational-wave observations has proved so far to be extremely challenging. In this \emph{letter}, we demonstrate the prospects of measuring black hole kicks through a multiband gravitational-wave network consisting of space mission LISA, the current earth-based detector network and a third-generation detector. For two distinct cases of remnant black hole kick (68 km/s, 1006 km/s) emerging from near identical pre-merger configuration of GW190521 -- the first confirmed intermediate-mass black hole -- we find that the multiband network will recover with 90\% credible level the projection of the kick vector relative to the orbital plane within tens of km/s accuracy. Such precise measurement of the kick offer a new set of multi-messenger follow-ups and unprecedented tests of astrophysical formation channels.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Multiband parameter estimation with phase coherence and extrinsic marginalization: Extracting more information from low-SNR CBC signals in LISA data

    gr-qc 2025-06 conditional novelty 8.0 of 10

    A coherent multiband Bayesian parameter estimation method with extrinsic-parameter marginalization extracts useful information from LISA observations of stellar-mass binary black holes down to LISA SNR 3, nearly doubl...

  2. Scalar kicks and memory

    gr-qc 2024-12 conditional novelty 6.0 of 10

    For hyperbolic binaries, a conformally coupled scalar changes the memory and zero-frequency power while a disformally coupled scalar changes only the center-of-mass kick.

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