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Impact of multiple modes on the black-hole superradiant instability
Giuseppe Ficarra, Paolo Pani, Helvi Witek
Ultralight bosonic fields in the mass range can trigger a superradiant instability that extracts energy and angular momentum from an astrophysi…
Black holes and binary mergers in scalar Gauss-Bonnet gravity: scalar field dynamics
Helvi Witek, Leonardo Gualtieri, Paolo Pani +1
We study the nonlinear dynamics of black holes that carry scalar hair and binaries composed of such black holes. The scalar hair is due to a linear or exponential coupling between…
Axionic instabilities and new black hole solutions
Mateja Boskovic, Richard Brito, Vitor Cardoso +2
The coupling between scalar and vector fields has a long and interesting history. Axions are one key possibility to solve the strong CP problem and axion-like particles could be on…
Black holes, gravitational waves and fundamental physics: a roadmap
Leor Barack, Vitor Cardoso, Samaya Nissanke +203
The grand challenges of contemporary fundamental physics---dark matter, dark energy, vacuum energy, inflation and early universe cosmology, singularities and the hierarchy problem-…