28 citations · 50 across the 11 of their papers we have counts for
5 papers · 1 filter
Deciphering the Instability of the Black Hole Ringdown Quasinormal Spectrum
A. Ianniccari, A. J. Iovino, A. Kehagias +4
The spectrum of the quasinormal modes of the gravitational waves emitted during the ringdown phase following the merger of two black holes is of primary importance in gravitational…
A Short Note on the Love Number of Extremal Reissner-Nordstrom and Kerr-Newman Black Holes
Alex Kehagias, Davide Perrone, Antonio Riotto
We provide a simple proof of why the Love number vanishes for extremal Reissner-Nordstrom and Kerr-Newman black holes. The argument is based on a conformal inversion isometry of th…
Why the Universal Threshold for Primordial Black Hole Formation is Universal
Alex Kehagias, Davide Perrone, Antonio Riotto
We show why the threshold for primordial black hole formation is universal (independent from the shape of the perturbation) when expressed in terms of the volume averaged compactio…
The Black Hole Formation -- Null Geodesic Correspondence
Andrea Ianniccari, Antonio J. Iovino, Alex Kehagias +2
We provide evidence for a correspondence between the formation of black holes and the stability of circular null geodesics around the collapsing perturbation. We first show that th…
The Primordial Black Hole Abundance: The Broader, the Better
A. Ianniccari, A. J. Iovino, A. Kehagias +2
We show that the abundance of primordial black holes, if formed through the collapse of large fluctuations generated during inflation and unless the power spectrum of the curvature…