820 citations · 1.8k across the 24 of their papers we have counts for
24 papers
Tidal Love numbers of static black holes in anti-de Sitter
Edgardo Franzin, Antonia M. Frassino, Jorge V. Rocha
Tidal Love numbers of anti-de Sitter black holes are understood as linear response coefficients governing how the holographically dual plasma polarizes when the geometry of the spa…
Mini boson stars in higher dimensions are radially unstable
Edgardo Franzin
Boson stars are self-gravitating solutions made entirely of fundamental massive bosonic fields. Here we investigate mini boson stars in non-compact spacetime dimensions and we…
Kerr Black Hole in Einstein--Æther Gravity
Edgardo Franzin, Stefano Liberati, Jacopo Mazza
While non-rotating black-hole solutions are well known in Einstein--æther gravity, no axisymmetric solutions endowed with Killing horizons have been so far found outside of the slo…
Lagrangian reverse engineering for regular black holes
Ana Bokulić, Edgardo Franzin, Tajron Jurić +1
Nonlinear extensions of classical Maxwell's electromagnetism are among the prominent candidates for theories admitting regular black hole solutions. A quest for such examples has b…
From regular black holes to horizonless objects: quasi-normal modes, instabilities and spectroscopy
Edgardo Franzin, Stefano Liberati, Vania Vellucci
We study gravitational and test-field perturbations for the two possible families of spherically symmetric black-hole mimickers that smoothly interpolate between regular black hole…
Stable Rotating Regular Black Holes
Edgardo Franzin, Stefano Liberati, Jacopo Mazza +1
We present a rotating regular black hole whose inner horizon has zero surface gravity for any value of the spin parameter, and is therefore stable against mass inflation. Our metri…
Echoes from backreacting exotic compact objects
Vania Vellucci, Edgardo Franzin, Stefano Liberati
The possible detection of echoes in late gravitational-wave signals is the most promising way to test horizonless alternatives to general relativistic black holes, and probe the ph…
Scalar perturbations around rotating regular black holes and wormholes: quasi-normal modes, ergoregion instability and superradiance
Edgardo Franzin, Stefano Liberati, Jacopo Mazza +2
We study scalar test-field perturbations on top of a Kerr--black-bounce background, i.e. a family of rotating regular black holes and/or rotating traversable wormholes that can mim…
Superradiance in deformed Kerr black holes
Mauro Oi, Edgardo Franzin, Stefano Liberati
Ongoing observations in the strong-field regime are in optimal agreement with general relativity, although current errors still leave room for small deviations from Einstein's theo…
Charged black-bounce spacetimes
Edgardo Franzin, Stefano Liberati, Jacopo Mazza +2
Given the recent development of rotating black-bounce-Kerr spacetimes, for both theoretical and observational purposes it becomes interesting to see whether it might be possible to…
Superradiance in Kerr-like black holes
Edgardo Franzin, Stefano Liberati, Mauro Oi
Recent strong-field regime tests of gravity are so far in agreement with general relativity. In particular, astrophysical black holes appear all to be consistent with the Kerr spac…
A novel family of rotating black hole mimickers
Jacopo Mazza, Edgardo Franzin, Stefano Liberati
The recent opening of gravitational wave astronomy has shifted the debate about black hole mimickers from a purely theoretical arena to a phenomenological one. In this respect, mis…
Stationary spacetimes with time-dependent real scalar fields
Edgardo Franzin, Ivica Smolić
In 1981 Wyman classified the solutions of the Einstein--Klein--Gordon equations with static spherically symmetric spacetime metric and vanishing scalar potential. For one of these…
Tidal Love Numbers of Kerr Black Holes
Alexandre Le Tiec, Marc Casals, Edgardo Franzin
The open question of whether a Kerr black hole can become tidally deformed or not has profound implications for fundamental physics and gravitational-wave astronomy. We consider a…
Sine-Gordon solitonic scalar stars and black holes
Edgardo Franzin, Mariano Cadoni, Matteo Tuveri
We study exact, analytic, static, spherically symmetric, four-dimensional solutions of minimally coupled Einstein-scalar gravity, sourced by a scalar field whose profile has the fo…
Hysteresis in for QFTs dual to spherical black holes
Mariano Cadoni, Edgardo Franzin, Matteo Tuveri
We define and compute the (analogue) shear viscosity to entropy density ratio for the QFTs dual to spherical AdS black holes both in Einstein and Gauss-Bonnet gravity i…
Van der Waals-like Behaviour of Charged Black Holes and Hysteresis in the Dual QFTs
Mariano Cadoni, Edgardo Franzin, Matteo Tuveri
Using the rules of the AdS/CFT correspondence, we compute the spherical analogue of the shear viscosity, defined in terms of the retarded Green function for the stress-energy tenso…
Testing strong-field gravity with tidal Love numbers
Vitor Cardoso, Edgardo Franzin, Andrea Maselli +2
The tidal Love numbers (TLNs) encode the deformability of a self-gravitating object immersed in a tidal environment and depend significantly both on the object's internal structure…
Is the gravitational-wave ringdown a probe of the event horizon?
Vitor Cardoso, Edgardo Franzin, Paolo Pani
It is commonly believed that the ringdown signal from a binary coalescence provides a conclusive proof for the formation of an event horizon after the merger. This expectation is b…
Brane solutions sourced by a scalar with vanishing potential and classification of scalar branes
M. Cadoni, E. Franzin, M. Serra
We derive exact brane solutions of minimally coupled Einstein-Maxwell-scalar gravity in d+2 dimensions with a vanishing scalar potential. The solutions are conformal to the Lifshit…
Black holes sourced by a massless scalar
Mariano Cadoni, Edgardo Franzin
We construct asymptotically flat black hole solutions of Einstein-scalar gravity sourced by a nontrivial scalar field with 1/r asymptotic behaviour. Near the singularity the black…
Inflation as de Sitter instability
Mariano Cadoni, Edgardo Franzin, Salvatore Mignemi
We consider cosmological inflation generated by a scalar field slowly rolling off from a de Sitter maximum of its potential. The models belong to the class of hilltop models and re…
Asymptotically flat black holes sourced by a massless scalar field
Mariano Cadoni, Edgardo Franzin
We derive exact, asymptotically flat black hole solutions of Einstein-scalar gravity sourced by a non trivial scalar field with asymptotic behaviour. They are determined usin…
A new look at hidden conformal symmetries of black holes
Edgardo Franzin, Ivica Smolić
We propose a different approach to the analysis of symmetries in the near-horizon region of black holes. The idea is presented here for spherically symmetric black holes, for which…