Extends relativistic EMRI calculations in scalar clouds from circular-equatorial to eccentric and inclined orbits around Schwarzschild black holes, revealing apsidal-precession resonances and inclination-dependent net energy transfer.
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Superradiant axion clouds around black holes can undergo gravitational superfluorescence via a seeded coherent quadrupolar transition, leading to a detectable delayed gravitational-wave pulse.
Eccentric EMRIs exhibit relativistic resonances in scalar fluxes that enhance interactions with scalar clouds and amplify waveform dephasing relative to circular orbits.
A novel quantity derived from GW signals encodes the density profile of dark dense environments around black holes, allowing characterization of the condensate type and DM properties via multi-wavelength observations.
Using S2 star periastron precession, the work constrains ultralight scalar dark matter mass ratios to below 10^{-3} or 1 and improves quadratic coupling bounds for masses 10^{-20} to 10^{-18} eV.
Ultralight boson clouds around primordial black holes emit high-frequency gravitational wave transients via superradiance and binary-driven transitions, but the signals fall below current detector sensitivity at plausible distances.
Bound states of a massive scalar field around topological stars form strictly normal modes, producing a hydrogen-like spectrum when the Compton wavelength exceeds the star size and localized states otherwise.
Models apsidal precession and dynamical friction from extended matter to extend GRAVITY constraints on boson clouds around Sgr A* and assess impacts on S-star orbits.
Black-hole superradiance extracts energy via the ergoregion and can trigger instabilities with applications to dark matter, beyond-Standard-Model physics, and laboratory analogs.
citing papers explorer
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Relativistic effects in extreme-mass-ratio inspirals within scalar clouds: Eccentric and inclined orbits
Extends relativistic EMRI calculations in scalar clouds from circular-equatorial to eccentric and inclined orbits around Schwarzschild black holes, revealing apsidal-precession resonances and inclination-dependent net energy transfer.
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Gravitational superfluorescence from superradiant axion clouds
Superradiant axion clouds around black holes can undergo gravitational superfluorescence via a seeded coherent quadrupolar transition, leading to a detectable delayed gravitational-wave pulse.
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Resonances as signatures of scalar clouds in eccentric extreme-mass-ratio inspirals
Eccentric EMRIs exhibit relativistic resonances in scalar fluxes that enhance interactions with scalar clouds and amplify waveform dephasing relative to circular orbits.
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Extracting Properties of Dark Dense Environments around Black Holes from Gravitational Waves
A novel quantity derived from GW signals encodes the density profile of dark dense environments around black holes, allowing characterization of the condensate type and DM properties via multi-wavelength observations.
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Constraining Ultralight Scalar Dark Matter in the Galactic Center with the S2 Orbit
Using S2 star periastron precession, the work constrains ultralight scalar dark matter mass ratios to below 10^{-3} or 1 and improves quadratic coupling bounds for masses 10^{-20} to 10^{-18} eV.
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High-frequency gravitational wave transients from superradiance
Ultralight boson clouds around primordial black holes emit high-frequency gravitational wave transients via superradiance and binary-driven transitions, but the signals fall below current detector sensitivity at plausible distances.
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Gravitational Atoms from Topological Stars
Bound states of a massive scalar field around topological stars form strictly normal modes, producing a hydrogen-like spectrum when the Compton wavelength exceeds the star size and localized states otherwise.
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Probing dense environments around Sgr A* with S-stars dynamics
Models apsidal precession and dynamical friction from extended matter to extend GRAVITY constraints on boson clouds around Sgr A* and assess impacts on S-star orbits.
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Superradiance -- the 2020 Edition
Black-hole superradiance extracts energy via the ergoregion and can trigger instabilities with applications to dark matter, beyond-Standard-Model physics, and laboratory analogs.
- Relativistic frequency shifts in gravitational waves from axion clouds