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Testing Gravity with Quasi Periodic Oscillations from accreting Black Holes: the Case of Einstein-Dilaton-Gauss-Bonnet Theory
Andrea Maselli, Leonardo Gualtieri, Paolo Pani +2
Quasi-Periodic Oscillations (QPOs) observed in the X-ray flux emitted by accreting black holes, are associated to phenomena occurring near the horizon. Future very large area X-ray…
Black holes as particle detectors: evolution of superradiant instabilities
Richard Brito, Vitor Cardoso, Paolo Pani
Superradiant instabilities of spinning black holes can be used to impose strong constraints on ultralight bosons, thus turning black holes into effective particle detectors. Howeve…
On the nonlinear instability of confined geometries
Hirotada Okawa, Vitor Cardoso, Paolo Pani
The discovery of a "weakly-turbulent" instability of anti-de Sitter spacetime supports the idea that confined fluctuations eventually collapse to black holes and suggests that simi…
Light rings as observational evidence for event horizons: long-lived modes, ergoregions and nonlinear instabilities of ultracompact objects
Vitor Cardoso, Luis C. B. Crispino, Caio F. B. Macedo +2
Ultracompact objects are self-gravitating systems with a light ring. It was recently suggested that fluctuations in the background of these objects are extremely long-lived and mig…
Superradiant instability of black holes immersed in a magnetic field
Richard Brito, Vitor Cardoso, Paolo Pani
Magnetic fields surrounding spinning black holes can confine radiation and trigger superradiant instabilities. To investigate this effect, we perform the first fully-consistent lin…
Can environmental effects spoil precision gravitational-wave astrophysics?
Enrico Barausse, Vitor Cardoso, Paolo Pani
[abridged abstract] No, within a broad class of scenarios. With the advent of gravitational-wave (GW) astronomy, environmental effects on the GW signal will eventually have to be q…