1.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Trieste Astronomical ObservatoryIT826 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di TriesteIT688 papers
- Scuola Internazionale Superiore di Studi AvanzatiIT606 papers
- University of TriesteIT516 papers
- Centre National de la Recherche ScientifiqueFR476 papers
- Ludwig-Maximilians-Universität MünchenDE400 papers
- Instituto de Astrofísica de CanariasES360 papers
- Max Planck Institute for Extraterrestrial PhysicsDE350 papers
- University College LondonGB348 papers
- Institute for High Energy PhysicsES346 papers
- Universidad de La LagunaES335 papers
- Institut d'Astrophysique de ParisFR332 papers
18 papers · 2 filters
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…
Rescuing the Unruh Effect in Lorentz Violating Gravity
F. Del Porro, M. Herrero-Valea, S. Liberati +1
While the robustness of Hawking radiation in the presence of UV Lorentz breaking is well-established, the Unruh effect has posed a challenge, with a large literature concluding tha…
Hawking Radiation in Lorentz Violating Gravity: A Tale of Two Horizons
F. Del Porro, M. Herrero-Valea, S. Liberati +1
Since their proposal, Lorentz violating theories of gravity have posed a potential threat to black hole thermodynamics, as superluminal signals appeared to be incompatible with the…
Astrophysical and Cosmological Relevance of the High-Frequency Features in the Stochastic Gravitational-Wave Background
Giulia Capurri, Andrea Lapi, Mario Spera +1
The stochastic gravitational-wave background (SGWB) produced by merging neutron stars exhibits a peak in the kHz band. In this paper, we develop a theoretical framework to exploit…
Ultracompact horizonless objects in order-reduced semiclassical gravity
Julio Arrechea, Carlos Barceló, Raúl Carballo-Rubio +1
The backreaction of quantum fields in their vacuum state results in equilibrium structures that surpass the Buchdahl compactness limit. Such backreaction is encapsulated in the vac…
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…
On the resilience of the gravitational variational principle under renormalization
Giulio Neri, Stefano Liberati
A well-defined variational principle for gravitational actions typically requires to cancel boundary terms produced by the variation of the bulk action with a suitable set of bound…
Well-posed evolution of field theories with anisotropic scaling: the Lifshitz scalar field in a black hole space-time
Marcelo E. Rubio, Áron D. Kovács, M. Herrero-Valea +2
Partial differential equations exhibiting an anisotropic scaling between space and time -- such as those of Horava-Lifshitz gravity -- have a dispersive nature. They contain higher…
Cosmological Probes of Structure Growth and Tests of Gravity
Jiamin Hou, Julian Bautista, Maria Berti +4
The current standard cosmological model is constructed within the framework of general relativity with a cosmological constant , which is often associated with dark energy, and…
Neural Posterior Estimation with guaranteed exact coverage: the ringdown of GW150914
Marco Crisostomi, Kallol Dey, Enrico Barausse +1
We analyze the ringdown phase of the first detected black-hole merger, GW150914, using a simulation-based inference pipeline based on masked autoregressive flows. We obtain approxi…
Two-body problem in theories with kinetic screening
Mateja Bošković, Enrico Barausse
New light scalar degrees of freedom may alleviate the dark matter and dark energy problems, but if coupled to matter, they generally mediate a fifth force. In order for this fifth…
Numerical simulations of divergence-type theories for conformal dissipative fluids
Pablo Montes, Marcelo E. Rubio, Oscar A. Reula
We present the first numerical simulations of the symmetric--hyperbolic theory for conformal dissipative relativistic fluids developed in [1]. In this theory, the information of th…
Black hole hairs in scalar-tensor gravity and the lack thereof
Lodovico Capuano, Luca Santoni, Enrico Barausse
Scalar-tensor theories are a natural alternative to general relativity, as they may provide an effective dark energy phenomenology on cosmological scales while passing local tests,…
On the Resilience of Black Hole Evaporation: Gravitational Tunneling through Universal Horizons
M. Schneider, F. Del Porro, M. Herrero-Valea +1
Using a quantum tunneling derivation, we show the resilience of Hawking radiation in Lorentz violating gravity. In particular, we show that the standard derivation of the Hawking e…
The physics of gravitational waves
Enrico Barausse
These lecture notes collect the material that I have been using over the years for various short courses on the physics of gravitational waves, first at the Institut d'Astrophysiqu…
Quasi-normal modes of non-separable perturbation equations: the scalar non-Kerr case
Rajes Ghosh, Nicola Franchini, Sebastian H. Völkel +1
Scalar, vector and tensor perturbations on the Kerr spacetime are governed by equations that can be solved by separation of variables, but the same is not true in generic stationar…
Can gravitational-wave memory help constrain binary black-hole parameters? A LISA case study
Silvia Gasparotto, Rodrigo Vicente, Diego Blas +2
Besides the transient effect, the passage of a gravitational wave also causes a persistent displacement in the relative position of an interferometer's test masses through the \emp…
Regular Black Holes and Horizonless Ultra-Compact Objects in Lorentz-Violating Gravity
Jacopo Mazza, Stefano Liberati
There is growing evidence that Hořava gravity may be a viable quantum theory of gravity. It is thus legitimate to expect that gravitational collapse in the full, non-projectable ve…