Axion clouds may survive the perturbative tidal interaction over the early inspiral phase of black hole binaries

  title={Axion clouds may survive the perturbative tidal interaction over the early inspiral phase of black hole binaries},
  author={Takuya Takahashi and Takahiro Tanaka},
  journal={Journal of Cosmology and Astroparticle Physics},
Gravitational wave observation has the potential of probing ultralight bosonic fields such as axions. Axions form a cloud around a rotating black hole (BH) by superradiant instability and should affect the gravitational waveform from binary BHs. On the other hand, considering the cloud associated with a BH in a binary system, tidal interaction depletes the cloud in some cases during the inspiral phase. We made an exhaustive study of the cloud depletion numerically in a wide parameter range for… Expand
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