33 citations · 218 across the 31 of their papers we have counts for
32 papers
The Irreversible Depletion of Dark Matter Spikes by Extreme-Mass-Ratio Inspirals
Charlie Sharpe, Yonadav Barry Ginat, Thomas F. M. Spieksma +2
Dense dark matter spikes around massive black holes (MBHs) have been widely predicted to produce gravitational-wave dephasing in extreme-mass-ratio inspirals (EMRIs) that are poten…
Deus Ex Statistica: A Statistical Solution to the binary-binary Outcome of the Chaotic, Non-Hierarchical Four-Body Problem
Yoav Zack, Hagai B. Perets, Yonadav Barry Ginat
We present an analytical, statistical solution to the binary-binary (2+2) outcome of the chaotic non-hierarchical four-body problem. The solution is based on the density-of-states…
Second-Generation Mass Peak in the Gravitational-Wave Population as a Probe of Globular Clusters
Yonadav Barry Ginat, Fabio Antonini, Elizabeth Flanagan +1
Gravitational-wave observations have revealed an excess of binary black hole mergers with primary masses near . We show that if this feature originates from dynam…
The Depletion of Collisionless Dark Matter Spikes
Charlie Sharpe, Yonadav Barry Ginat, Thomas F. M. Spieksma +2
Dense concentrations of dark matter surrounding black holes provide a compelling opportunity to probe the nature of dark matter. In the classic Gondolo--Silk model, the adiabatic g…
Apparent Dark-Energy Evolution from Cosmic Inhomogeneities
Yonadav Barry Ginat, Pedro G. Ferreira
A mildly inhomogeneous universe with a cosmological constant may look like it contains evolving dark energy. We show that could be the case by modelling the inhomogeneities and the…
Harmonic-decomposition approach to dynamical friction for eccentric orbits
Gali Eytan, Vincent Desjacques, Yonadav Barry Ginat
Compact objects evolving in an astrophysical environment experience a gravitational drag force known as dynamical friction. We present a multipole-frequency decomposition to evalua…
Gravitational-wave constraints on the pair-instability mass gap and nuclear burning in massive stars
Fabio Antonini, Isobel Romero-Shaw, Thomas Callister +5
Pair-instability should prevent the direct formation of black holes above about creating a pair-instability mass gap. Yet gravitational-wave observations have detected…
Dynamical Evolution of Quasi-Hierarchical Triples
Yonadav Barry Ginat, Jakob Stegmann, Johan Samsing
We study the gravitational dynamics of quasi-hierarchical triple systems, where the outer orbital period is significantly longer than the inner one, but the outer orbit is extremel…
Angular-momentum pairs in spherical systems: applications to the Galactic centre
Taras Panamarev, Yonadav Barry Ginat, Bence Kocsis
Consider a system of point masses in a spherical potential. In such systems objects execute planar orbits covering two-dimensional rings or annuli, represented by the angular-momen…
Large-Scale-Structure Observables in General Relativity Validated at Second Order
Antoine Villey, Yonadav Barry Ginat, Vincent Desjacques +2
We present a second-order calculation of relativistic large-scale-structure observables in cosmological perturbation theory, specifically the "cosmic rulers and clock", which are t…
A Million Three-body Binaries Caught by Gaia
Dany Atallah, Yonadav Barry Ginat, Newlin C. Weatherford
Gaia observations have revealed over a million stellar binary candidates within ~1 kpc of the Sun, predominantly characterized by orbital separations >10^3 AU and eccentricities >0…
Constraining Axion Dark Matter with Galactic-Centre Resonant Dynamics
Yonadav Barry Ginat, Bence Kocsis
We study the influence of fuzzy-dark-matter cores on the orbits of stars at the Galactic centre. This dark matter candidate condenses into dense, solitonic cores, and, if a super-m…
Resonant Locking Between Binary Systems Induced by Gravitational Waves
Charlie Sharpe, Yonadav Barry Ginat, Zeyuan Xuan +1
The interaction of gravitational waves (GWs) with matter is thought to be typically negligible in the Universe. We identify an exception in the case of resonant interactions, where…
Gravitational Turbulence: the Small-Scale Limit of the Cold-Dark-Matter Power Spectrum
Yonadav Barry Ginat, Michael L. Nastac, Robert J. Ewart +3
The matter power spectrum, , is one of the fundamental quantities in the study of large-scale structure in cosmology. Here, we study its small-scale asymptotic limit, and sho…
Detection prospects for the GW background of Galactic (sub)solar mass primordial black holes
Frans van Die, Ivan Rapoport, Yonadav Barry Ginat +1
In multi-component dark matter models, a fraction of the dark matter could be in the form of primordial black holes (PBHs) with (sub)solar masses. Some would have fo…
Three-Body Binary Formation in Clusters: Analytical Theory
Yonadav Barry Ginat, Hagai B. Perets
Binary formation in clusters through triple encounters between three unbound stars, 'three-body' binary formation, is one of the main dynamical formation processes of binary system…
Frequency-Domain Distribution of Astrophysical Gravitational-Wave Backgrounds
Yonadav Barry Ginat, Robert Reischke, Ivan Rapoport +1
The superposition of many astrophysical gravitational wave (GW) signals below typical detection thresholds baths detectors in a stochastic gravitational wave background (SGWB). In…
Resonant Dynamical Friction Around a Super-Massive Black Hole: Analytical Description
Yonadav Barry Ginat, Taras Panamarev, Bence Kocsis +1
We derive an analytical model for the so-called phenomenon of `resonant dynamical friction', where a disc of stars around a super-massive black hole interacts with a massive pertur…
Analytic Modelling of Binary-Single Encounters: Non-Thermal Eccentricity Distribution and Gravitational-Wave Source Formation
Yonadav Barry Ginat, Hagai Perets
Chaotic three-body interactions may lead to the formation of gravitational-wave sources. Here, by modelling the encounter as a series of close, non-hierarchical, triple approaches,…
On the asymptotic behaviour of cosmic density-fluctuation power spectra of cold dark matter
Sara Konrad, Yonadav Barry Ginat, Matthias Bartelmann
We study the small-scale asymptotic behaviour of the cold dark matter density fluctuation power spectrum in the Zel'dovich approximation, without introducing an ultraviolet cut-off…
Binaries are softer than they seem: Effects of an external potential on the scattering dynamics of binaries
Yonadav Barry Ginat, Hagai B. Perets
Binary evolution is influenced by dynamical scattering with other stars in dense environments. Heggie's law states that, due to their environments, hard binaries (whose orbital ene…
Covariant Decomposition of The Non-Linear Galaxy Number Counts and Their Monopole
Yonadav Barry Ginat, Vincent Desjacques, Donghui Jeong +1
We present a fully non-linear and relativistically covariant expression for the observed galaxy density contrast. Building on a null tetrad tailored to the cosmological observer's…
The Equivalence Principle and The Cosmological Constant Problem
Yonadav Barry Ginat
In this essay I point out that, in the context of semi-classical gravity, the equivalence principle can mitigate the cosmological constant problem. On a Minkowski space-time backgr…
Probing supermassive stars and massive black hole seeds through gravitational wave inspirals
Yael Raveh, Yonadav Barry Ginat, Hagai B. Perets +1
We propose a novel source of gravitational wave emission: the inspirals of compact fragments inside primordial supermassive stars (SMSs). Such systems are thought to be an essentia…