Multiple quasinormal modes and overtones are measured from interface waves on a giant quantum vortex in superfluid helium-4 that emulates a rotating black-hole geometry.
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Semi-analytic waveform model for scalar environments around black hole binaries is validated against numerical relativity and applied to LIGO-Virgo-KAGRA data to obtain upper limits on scalar densities with tentative evidence in GW190728.
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Black-hole spectroscopy from a giant quantum vortex
Multiple quasinormal modes and overtones are measured from interface waves on a giant quantum vortex in superfluid helium-4 that emulates a rotating black-hole geometry.
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Scalar fields around black hole binaries in LIGO-Virgo-KAGRA
Semi-analytic waveform model for scalar environments around black hole binaries is validated against numerical relativity and applied to LIGO-Virgo-KAGRA data to obtain upper limits on scalar densities with tentative evidence in GW190728.