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gr-qc2026

Universality in the Transition from Inspiral to Plunge for Extreme-Mass-Ratio-Inspirals: High-Accuracy Analytic Solutions and Catastrophe Theory

Ariadna Ribes Metidieri, Béatrice Bonga, Badri Krishnan +1

We revisit the transition from inspiral to plunge for extreme mass-ratio inspirals on quasi-circular, inclined orbits in Kerr spacetime from the perspective of catastrophe theory.…

gr-qc2025

Resolving white dwarf binaries within globular clusters with LISA

Wouter G. J. van Zeist, Gijs Nelemans, Shu-Xu Yi +1

Context: Globular clusters (GCs) around the Milky Way (MW) are expected to host white dwarf (WD) binaries emitting gravitational waves that could be detectable by LISA. Aims: Our a…

gr-qc2025★ 3 cited

Entanglement and correlations between local observables in de Sitter spacetime

Patricia Ribes-Metidieri, Ivan Agullo, Béatrice Bonga

Studies of quantum field entanglement in de Sitter space based on the von Neumann entropy of local patches have concluded that curvature enhances entanglement between regions and t…

gr-qc2025★ 3 cited

Equivalence of scalar-tensor theories and scale-dependent gravity

Philipp Neckam, Christian Käding, Benjamin Koch +4

We present a novel equivalence between scale-dependent gravity and scalar-tensor theories that have only a single scalar field with a canonical kinetic term in the Einstein frame a…

gr-qc2025★ 2 cited

Regular Black Hole Cores via Gravitational Evanescence of Collapsing Matter

Antonio Panassiti

Modified Einstein's equations implementing both an energy-dependent Newtonian and cosmological constant can be obtained via a modified action characterised by a non-minimal gravity…

gr-qc2025★ 1 cited

Dynamical Horizon Segments and Spacetime Isometries

Abhay Ashtekar, Badri Krishnan

Given a space-time admitting a dynamical horizon segment (DHS) , we show that there are stringent constraints on the Killing fields that…

gr-qc2025★ 1 cited

Indications against dynamical CPT symmetry restoration in quantum gravity

Astrid Eichhorn, Marc Schiffer

CPT symmetry is at the heart of the Standard Model of particle physics and experimentally very well tested, but expected to be broken in some approaches to quantum gravity. It thus…

gr-qc2025★ 97 cited

The Science of the Einstein Telescope

Adrian Abac, Raul Abramo, Simone Albanesi +485

Einstein Telescope (ET) is the European project for a gravitational-wave (GW) observatory of third-generation. In this paper we present a comprehensive discussion of its science ob…

gr-qc2025★ 15 cited

Quasi-Local Black Hole Horizons: Recent Advances

Abhay Ashtekar, Badri Krishnan

While the early literature on black holes focused on event horizons, subsequently it was realized that their teleological nature makes them unsuitable for many physical application…

gr-qc2025

Black Hole Tomography: Unveiling Black Hole Ringdown via Gravitational Wave Observations

A. Ribes Metidieri, B. Bonga, B. Krishnan

During the post-merger regime of a binary black hole merger, the gravitational wave signal consists of a superposition of quasi-normal modes (QNMs) of the remnant black hole. It ha…

gr-qc2025★ 3 cited

Robust and fast parameter estimation for gravitational waves from binary neutron star merger remnants

Stamatis Vretinaris, Georgios Vretinaris, Christos Mermigkas +2

We present a robust and efficient methodology for parameter estimation of gravitational waves generated during the post-merger phase of binary neutron star mergers. Our approach le…

gr-qc2024

An upper limit to the lifetime of stellar remnants from gravitational pair production

Heino Falcke, Michael F. Wondrak, Walter D. van Suijlekom

Black holes are assumed to decay via Hawking radiation. Recently we found evidence that spacetime curvature alone without the need for an event horizon leads to black hole evaporat…

gr-qc2024★ 5 cited

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…

gr-qc2024★ 10 cited

Multi-domain spectral method for self-force calculations

Rodrigo Panosso Macedo, Patrick Bourg, Adam Pound +1

Second-order self-force calculations will be critical for modelling extreme-mass-ratio inspirals, and they are now known to have high accuracy even for binaries with mass ratios $\…

gr-qc2024★ 5 cited

Simple, efficient method of calculating the Detweiler-Whiting singular field to very high order

Patrick Bourg, Adam Pound, Samuel D. Upton +1

Most self-force calculations rely, in one way or another, on representations of a particle's Detweiler- Whiting singular field. We present a simple method of calculating the singul…

gr-qc2024

Tidal deformations of slowly spinning isolated horizons

A. Ribes Metidieri, B. Bonga, B. Krishnan

It is generally believed that tidal deformations of a black hole in an external field, as measured using its gravitational field multipoles, vanish. However, this does not mean tha…

gr-qc2024★ 13 cited

Implementation of a GHZ-Teukolsky puncture scheme for gravitational self-force calculations

Patrick Bourg, Benjamin Leather, Marc Casals +2

Post-adiabatic models of extreme- and intermediate-mass-ratio inspirals will require calculations of second-order gravitational self-force effects in the spacetime of a spinning, K…

gr-qc2024★ 6 cited

Reply to "Comment" on "Regular evaporating black holes with stable cores"

Alfio Bonanno, Amir-Pouyan Khosravi, Frank Saueressig

We reply to the ``Comment'' on ``Regular evaporating black holes with stable cores'' by R. Carballo-Rubio, F. Di Filippo, S. Liberati, C. Pacilio, and M. Visser. As a key result, w…

gr-qc2024★ 1 cited

Radial Gravitational Collapse Causes Timelike Incompleteness

Leonardo García-Heveling

We show that a globally hyperbolic spacetime containing a trapped surface and satisfying the strong energy condition and a condition on certain radial tidal forces must be timelike…

gr-qc2023★ 3 cited

Testing the Existence of Event Horizons against Rotating Reflecting Surfaces

Joost de Kleuver, Thomas Bronzwaer, Heino Falcke +4

Recently the Event Horizon Telescope observed black holes at event horizon scales for the first time, enabling us to now test the existence of event horizons. Although event horizo…

gr-qc2023★ 12 cited

Spectroscopy for asymmetric binary black hole mergers

Jahed Abedi, Collin D. Capano, Shilpa Kastha +5

We study Bayesian inference of black hole ringdown modes for simulated binary black hole signals. We consider to what extent different fundamental ringdown modes can be identified…

gr-qc2023★ 1 cited

A gating-and-inpainting perspective on GW150914 ringdown overtone: understanding the data analysis systematics

Yi-Fan Wang, Collin D. Capano, Jahed Abedi +5

We revisit the recent debate on the evidence for an overtone in the black hole ringdown of GW150914 using an independent data-analysis pipeline. By gating and inpainting the data,…

gr-qc2023★ 3 cited

Properties of Quasi-local mass in binary black hole mergers

Daniel Pook-Kolb, Bowen Zhao, Lars Andersson +2

Identifying a general quasi-local notion of energy-momentum and angular momentum would be an important advance in general relativity with potentially important consequences for mat…

gr-qc2023★ 2 cited

Reply to "Comment on 'Gravitational Pair Production and Black Hole Evaporation'"

Michael F. Wondrak, Walter D. van Suijlekom, Heino Falcke

In a recent letter, the authors presented a unified derivation of the electric Schwinger effect and a generalized Hawking effect with an additional radiation component. The approac…