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Gravitational Wave Signatures of Highly Compact Boson Star Binaries
Carlos Palenzuela, Paolo Pani, Miguel Bezares +3
Solitonic boson stars are stable objects made of a complex scalar field with a compactness that can reach values comparable to that of neutron stars. A recent study of the collisio…
Tests for the existence of horizons through gravitational wave echoes
Vitor Cardoso, Paolo Pani
The existence of black holes and of spacetime singularities is a fundamental issue in science. Despite this, observations supporting their existence are scarce, and their interpret…
On Bouncing and Nonsingular Solutions in Einstein-scalar-Gauss-Bonnet Cosmology
Laura Sberna, Paolo Pani
It is generically believed that higher-order curvature corrections to the Einstein-Hilbert action might cure the curvature singularities that plague general relativity. Here we con…
The observational evidence for horizons: from echoes to precision gravitational-wave physics
Vitor Cardoso, Paolo Pani
The existence of black holes and of spacetime singularities is a fundamental issue in science. Despite this, observations supporting their existence are scarce, and their interpret…
Gravitational wave searches for ultralight bosons with LIGO and LISA
Richard Brito, Shrobana Ghosh, Enrico Barausse +5
Ultralight bosons can induce superradiant instabilities in spinning black holes, tapping their rotational energy to trigger the growth of a bosonic condensate. Possible observation…
Stochastic and resolvable gravitational waves from ultralight bosons
Richard Brito, Shrobana Ghosh, Enrico Barausse +5
Ultralight scalar fields around spinning black holes can trigger superradiant instabilities, forming a long-lived bosonic condensate outside the horizon. We use numerical solutions…