10.9k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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36 papers · 2 filters
Causality and Stability from Acoustic Geometry
Ignacy Sawicki, Georg Trenkler, Alexander Vikman
In scalar-tensor theories with derivative interactions, backgrounds spontaneously break local Lorentz invariance. We study the motion of perturbations of the scalar, "phonons", on…
Stealth black holes in Aether Scalar Tensor theory
Constantinos Skordis, David M. J. Vokrouhlicky
The Aether Scalar Tensor (AeST) theory is an extension of general relativity(GR) successful at reproducing galactic rotational curves, gravitational lensing, linear large scale str…
Analytic Solution for the Motion of Spinning Particles in Kerr Space-Time
Viktor Skoupý, Vojtěch Witzany
The equations of motion of massive test particles near Kerr black holes are separable in Boyer-Lindquist coordinates, as established by Carter. This separability, however, is lost…
Actions of spinning compact binaries: Spinning particle in Kerr matched to dynamics at 1.5 post-Newtonian order
Vojtěch Witzany, Viktor Skoupý, Leo C. Stein +1
The motion of compact binaries is influenced by the spin of their components starting at the 1.5 post-Newtonian (PN) order. On the other hand, in the large mass ratio limit, the sp…
A Unified Spectral Approach for Quasinormal Modes of Lee-Wick Black Holes
Davide Batic, Denys Dutykh, Breno Loureiro Giacchini
In this paper, we undertake a comprehensive examination of quasinormal modes linked to Lee-Wick black holes, delving into scalar, electromagnetic, and gravitational perturbations u…
Symmetry reduction of gravitational Lagrangians
Guillermo Frausto, Ivan Kolář, Tomáš Málek +1
We analyze all possible symmetry reductions of Lagrangians that yield fully equivalent field equations for any 4-dimensional metric theory of gravity. Specifically, we present a co…
Dust collapse and horizon formation in Quadratic Gravity
Luca Buoninfante, Francesco Di Filippo, Ivan Kolář +1
Quadratic Gravity supplements the Einstein-Hilbert action by terms quadratic in the spacetime curvature. This leads to a rich phase space of static, compact gravitating objects inc…
Spinning particles near Kerr black holes: Orbits and gravitational-wave fluxes through the Hamilton-Jacobi formalism
Gabriel Andres Piovano, Christiana Pantelidou, Jake Mac Uilliam +1
Extreme mass-ratio inspirals are among the key sources of gravitational waves for the Laser Interferometer Space Antenna space-based gravitational-wave detector. Achieving sufficie…
Love symmetry in higher-dimensional rotating black hole spacetimes
Finnian Gray, Cynthia Keeler, David Kubiznak +1
We develop a method for constructing a 1-parameter family of globally-defined Love symmetry generators in rotating black hole spacetimes of general dimension. The key ingredient is…
Electromagnetized black holes and swirling backgrounds in nonlinear electrodynamics: The ModMax case
José Barrientos, Adolfo Cisterna, Mokhtar Hassaine +1
This work focuses on constructing electromagnetized black holes and vortex-like backgrounds within the framework of the ModMax theory--the unique nonlinear extension of Maxwell's t…
Initial data for a deformed isolated horizon
Aleš Flandera, David Kofroň, Tomáš Ledvinka
Within the isolated horizon formalism, we investigate a static axisymmetric space-time of a black hole influenced by matter in its neighborhood. To illustrate the role of ingredien…
From spacetime thermodynamics to Weyl transverse gravity
Ana Alonso-Serrano, Luis J. Garay, Marek Liška
There exist two consistent theories of self-interacting gravitons: general relativity and Weyl transverse gravity. The latter has the same classical solutions as general relativity…
Black holes of type D revisited: relating their various metric forms
Hryhorii Ovcharenko, Jiri Podolsky, Marco Astorino
We investigate a complete family of spacetimes which represent black holes with rotation, NUT twist, acceleration, electric and magnetic charges. These are exact solutions of the E…
A note on the junction conditions in f(Q)-gravity
Stefano Vignolo, Fabrizio Esposito, Sante Carloni
Using the notion of distribution-valued tensor, we discuss the junction conditions within the framework of f(Q)-gravity. We obtain the necessary and sufficient conditions for two d…
All non-expanding gravitational waves in -dimensional (anti-)de Sitter space
Marcello Ortaggio, Jakub Voldřich, José Barrientos
We present a complete, theory-independent classification of -dimensional Kundt spacetimes of Weyl and traceless-Ricci type N. We show that these geometries consist of three inva…
Carroll black holes in (A)dS and their higher-derivative modifications
Poula Tadros, Ivan Kolář
We define the Carrollian black holes corresponding to the limit of Schwarzschild-(A)dS spacetime and its higher-derivative counterpart known as Schwarzschild-Bach-(A)dS spacetime,…
Toward Singularity Theorems with Torsion
Armin van de Venn, Ujjwal Agarwal, David Vasak
This study examines the formulation of a singularity theorem for timelike curves including torsion, and establishes the foundational framework necessary for its derivation. We begi…
On supertranslation invariant Lorentz charges
Sumanta Chakraborty, Sk Jahanur Hoque, Amitabh Virmani
In recent papers, Fuentealba, Henneaux, and Troessaert (FHT) gave definitions for supertranslation invariant Lorentz charges in the ADM Hamiltonian formalism and showed that their…
Analysis of gravitational radiation generated by type D black holes with positive cosmological constant
Francisco Fernández-Álvarez, Jiří Podolský, José M. M. Senovilla
The criterion for existence of gravitational radiation at conformal infinity in the presence of a positive cosmological constant is applied to a general family of exact solutions r…
Can light-rings self-gravitate?
Francesco Di Filippo, Luciano Rezzolla
In a spherically symmetric and static spacetime of a compact object, such as that of a Schwarzschild black hole, the light-ring is a 2-sphere where photons experience the only poss…
Charged black holes in quadratic gravity
Vojtech Pravda, Alena Pravdova, George Turner
We study electrically charged, static, spherically symmetric black holes in quadratic gravity using the conformal-to-Kundt technique, which leads to a considerable simplification o…
Post-Newtonian expansions of extreme mass ratio inspirals of spinning bodies into Schwarzschild black holes
Viktor Skoupý, Vojtěch Witzany
Space-based gravitational-wave detectors such as LISA are expected to detect inspirals of stellar-mass compact objects into massive black holes. Modeling such inspirals requires fu…
Toward regular black holes in sixth-derivative gravity
Breno L. Giacchini, Ivan Kolář
We study spherically symmetric static solutions of the most general sixth-derivative gravity using series expansions. Specifically, we prove that the only solutions of the complete…
Fully extremal black holes: a black hole graveyard?
Francesco Di Filippo, Stefano Liberati, Matt Visser
While the standard point of view is that the ultimate endpoint of black hole evolution is determined by Hawking evaporation, there is a growing evidence that classical and semi-cla…