Publications (72)
Towards the routine use of subdominant harmonics in gravitational-wave inference: re-analysis of GW190412 with generation X waveform models
Marta Colleoni, Maite Mateu-Lucena, Héctor Estellés +5
We re-analyse the gravitational-wave event GW190412 with state-of-the-art phenomenological waveform models. This event, which has been associated with a black hole merger, is inter…
Time-domain effective-one-body gravitational waveforms for coalescing compact binaries with nonprecessing spins, tides and self-spin effects
Alessandro Nagar, Sebastiano Bernuzzi, Walter Del Pozzo +21
We present TEOBResumS, a new effective-one-body (EOB) waveform model for nonprecessing (spin-aligned) and tidally interacting compact binaries.Spin-orbit and spin-spin effects are…
New effective precession spin for modeling multimodal gravitational waveforms in the strong-field regime
Lucy M. Thomas, Patricia Schmidt, Geraint Pratten
Accurately modelling the complete gravitational-wave signal from precessing binary black holes through the late inspiral, merger and ringdown remains a challenging problem. The lac…
Impact of Numerical Relativity information on effective-one-body waveform models
Alessandro Nagar, Gunnar Riemenschneider, Geraint Pratten
We present a comprehensive comparison of the spin-aligned effective-one-body (EOB) waveform model of Nagar et al. [Phys. Rev. D93, 044046 (2016)], informed using 40 numerical-relat…
Binary black hole scattering with generic spins
Adam Clark, Geraint Pratten, Patricia Schmidt
In this Letter, we confront high-order post-Minkowskian (PM) predictions for generic-spin black-hole scattering with numerical-relativity (NR) simulations for the first time, targe…
A simple model of complete precessing black-hole-binary gravitational waveforms
Mark Hannam, Patricia Schmidt, Alejandro Bohé +5
The construction of a model of the gravitational-wave (GW) signal from generic configurations of spinning-black-hole binaries, through inspiral, merger and ringdown, is one of the…
Characterization of merging black holes with two precessing spins
Viola De Renzis, Davide Gerosa, Geraint Pratten +2
Spin precession in merging black-hole binaries is a treasure trove for both astrophysics and fundamental physics. There are now well-established strategies to infer from gravitatio…
3D Weak Lensing: Modified Theories of Gravity
Geraint Pratten, Dipak Munshi, Patrick Valageas +1
Weak lensing (WL) promises to be a particularly sensitive probe of both the growth of large scale structure (LSS) as well as the fundamental relation between matter density perturb…
Orbital eccentricity in a neutron star - black hole merger
Gonzalo Morras, Geraint Pratten, Patricia Schmidt
The observation of gravitational waves from merging black holes and neutron stars provides a unique opportunity to discern information about their astrophysical environment. Two si…
Effects of Linear Redshift Space Distortions and Perturbation Theory on BAOs: A 3D Spherical Analysis
Geraint Pratten, Dipak Munshi
The Baryon Acoustic Oscillations (BAO) are features in the matter power spectrum on scales of order 100-150 h^{-1} Mpc that promise to be a powerful tool to constrain and test cosm…
Strong Field Scattering of Two Black Holes: Exploring Gauge Flexibility
Adam Clark, Geraint Pratten
Recent advances in post-Minkowskian (PM) gravity provide new avenues for the high precision modeling of compact binaries. In conjunction with the effective one body (EOB) formalism…
Reconstructing the Thermal Sunyaev-Zel'dovich Effect in 3D
Geraint Pratten, Dipak Munshi
The thermal Sunyaev-Zel'dovich (tSZ) effect measures the line-of-sight projection of the thermal pressure of free electrons and lacks any redshift information. By cross correlating…
Precision tracking of massive black hole spin evolution with LISA
Geraint Pratten, Patricia Schmidt, Hannah Middleton +1
The Laser Interferometer Space Antenna (LISA) will play a vital role in constraining the origin and evolution of massive black holes throughout the Universe. In this study we use a…
New Horizons for Fundamental Physics with LISA
K. G. Arun, Enis Belgacem, Robert Benkel +138
The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitatio…
Strong Field Scattering of Black Holes: Assessing Resummation Strategies
Shaun Swain, Geraint Pratten, Patricia Schmidt
Recent developments in post-Minkowksian (PM) calculations have led to a fast-growing body of weak-field perturbative information. As such, there is major interest within the gravit…
Waveform Modelling for the Laser Interferometer Space Antenna
LISA Consortium Waveform Working Group, Niayesh Afshordi, Sarp Akçay +144
LISA, the Laser Interferometer Space Antenna, will usher in a new era in gravitational-wave astronomy. As the first anticipated space-based gravitational-wave detector, it will exp…
Setting the cornerstone for the IMRPhenomX family of models for gravitational waves from compact binaries: The dominant harmonic for non-precessing quasi-circular black holes
Geraint Pratten, Sascha Husa, Cecilio Garcia-Quiros +4
In this paper we present IMRPhenomXAS, a thorough overhaul of the IMRPhenomD [1,2] waveform model, which describes the dominant spherical harmonic mode of non-pr…
Strong-field scattering of two spinning black holes: Numerical Relativity versus post-Minkowskian gravity
Piero Rettegno, Geraint Pratten, Lucy Thomas +2
Highly accurate models of the gravitational-wave signal from coalescing compact binaries are built by completing analytical computations of the binary dynamics with non-perturbativ…
Stars or gas? Constraining the hardening processes of massive black-hole binaries with LISA
Alice Spadaro, Riccardo Buscicchio, David Izquierdo-Villalba +3
Massive black-hole binaries will be the loudest sources detectable by LISA. These systems are predicted to form during the hierarchical assembly of cosmic structures and coalesce b…
Non-Gaussianity in Large Scale Structure and Minkowski Functionals
Geraint Pratten, Dipak Munshi
Minkowski Functionals (MFs) are topological statistics that have become one of many standard tools used for investigating the statistical properties of cosmological random fields.…
A Multipolar Effective One Body Model for Non-Spinning Black Hole Binaries
Alessandro Nagar, Geraint Pratten, Gunnar Riemenschneider +1
We introduce \TEOBiResumSM{}, a nonspinning inspiral-merger-ringdown waveform model built within the effective one body (EOB) framework that includes gravitational waveform modes b…
Inferring eccentricity evolution from observations of coalescing binary black holes
Alice Bonino, Rossella Gamba, Patricia Schmidt +5
The origin and formation of stellar-mass binary black holes remains an open question that can be addressed by precise measurements of the binary and orbital parameters from their g…
Measuring precession in asymmetric compact binaries
Geraint Pratten, Patricia Schmidt, Riccardo Buscicchio +1
Gravitational-wave observations of merging compact binaries hold the key to precision measurements of the objects' masses and spins. General-relativistic precession, caused by spin…
The most powerful astrophysical events: Gravitational-wave peak luminosity of binary black holes as predicted by numerical relativity
David Keitel, Xisco Jiménez Forteza, Sascha Husa +9
For a brief moment, a binary black hole (BBH) merger can be the most powerful astrophysical event in the visible universe. Here we present a model fit for this gravitational-wave p…
Gravitational-wave selection effects using neural-network classifiers
Davide Gerosa, Geraint Pratten, Alberto Vecchio
We present a novel machine-learning approach to estimate selection effects in gravitational-wave observations. Using techniques similar to those commonly employed in image classifi…
Prospects for distinguishing dynamical tides in inspiralling binary neutron stars with third generation gravitational-wave detectors
Natalie Williams, Geraint Pratten, Patricia Schmidt
Tidal effects in gravitational-wave (GW) observations from binary neutron star mergers have the potential to probe ultra-dense matter and shed light on the unknown nuclear equation…
The impact of selection biases on tests of general relativity with gravitational-wave inspirals
Ryan Magee, Maximiliano Isi, Ethan Payne +4
Tests of general relativity with gravitational wave observations from merging compact binaries continue to confirm Einstein's theory of gravity with increasing precision. However,…
Improved post-Newtonian waveform model for inspiralling precessing-eccentric compact binaries
Gonzalo Morras, Geraint Pratten, Patricia Schmidt
The measurement of spin-precession and orbital eccentricity in gravitational-wave (GW) signals is a key priority in GW astronomy, as these effects not only provide insights into th…
What is the nature of GW230529? An exploration of the gravitational lensing hypothesis
Justin Janquart, David Keitel, Rico K. L. Lo +26
On the 29th of May 2023, the LIGO-Virgo-KAGRA Collaboration observed a compact binary coalescence event consistent with a neutron star-black hole merger, though the heavier object…
Fast neural network surrogate for multimodal effective-one-body gravitational waveforms from generically precessing compact binaries
Christopher Whittall, Geraint Pratten
Gravitational waveform templates are a key ingredient for the detection and characterization of gravitational waves emitted by compact binary mergers in the universe. These templat…
Phenomenological model of gravitational self-force enhanced tides in inspiralling binary neutron stars
Natalie Williams, Patricia Schmidt, Geraint Pratten
Gravitational waves from inspiralling binary neutron stars provide unique access to ultra-dense nuclear matter and offer the ability to constrain the currently unknown neutron star…
High-Post-Newtonian-Order Dynamics Induced by Tail-of-Tail Interactions: The Non-Geodesic Terms
Geraint Pratten, G. Pratten
We compute the tail-of-tail contribution to the conservative dynamics of eccentric, non-spinning compact binaries to relative 1PN order and to . Using the …
Black holes, gravitational waves and fundamental physics: a roadmap
Leor Barack, Vitor Cardoso, Samaya Nissanke +203
The grand challenges of contemporary fundamental physics---dark matter, dark energy, vacuum energy, inflation and early universe cosmology, singularities and the hierarchy problem-…
Mode-by-mode Relative Binning: Fast Likelihood Estimation for Gravitational Waveforms with Spin-Orbit Precession and Multiple Harmonics
Nathaniel Leslie, Liang Dai, Geraint Pratten
Faster likelihood evaluation enhances the efficiency of gravitational wave signal analysis. We present Mode-by-mode Relative Binning (MRB), a new method designed for obtaining fast…
Extending Ground-Based Gravitational-Wave Sensitivity to 5 Hz
Amit Singh Ubhi, Lari Koponen, Jiri Smetana +11
Extending the sensitivity of terrestrial gravitational-wave detectors below 20 Hz is a long-standing challenge, limited by ground motion and inertial sensing noise. In this letter,…
Prospects for characterizing Population III remnants with next-generation gravitational-wave observatories
N. V. Krishnendu, Patricia Schmidt, Geraint Pratten
The most distant gravitational-wave (GW) detection by LIGO, Virgo and KAGRA so far is a binary black hole (BBH) merger at a redshift of , corresponding to a luminosity d…
Constraining the lensing of binary neutron stars from their stochastic background
Riccardo Buscicchio, Christopher J. Moore, Geraint Pratten +2
Gravitational wave (GW) transients from binary neutron star (BNS) coalescences can, in principle, be subject to gravitational lensing thereby increasing the amplitude and signal-to…
Computationally efficient models for the dominant and sub-dominant harmonic modes of precessing binary black holes
Geraint Pratten, Cecilio GarcÃa-Quirós, Marta Colleoni +8
We present IMRPhenomXPHM, a phenomenological frequency-domain model for the gravitational-wave signal emitted by quasi-circular precessing binary black holes, which incorporates mu…
Validity of common modelling approximations for precessing binary black holes with higher-order modes
Antoni Ramos-Buades, Patricia Schmidt, Geraint Pratten +1
The current paradigm for constructing waveforms from precessing compact binaries is to first construct a waveform in a non-inertial, co-precessing binary source frame followed by a…
The Next Generation Global Gravitational Wave Observatory: The Science Book
Vicky Kalogera, B. S. Sathyaprakash, Matthew Bailes +88
The next generation of ground-based gravitational-wave detectors will observe coalescences of black holes and neutron stars throughout the cosmos, thousands of them with exceptiona…
Covariant Perturbations of f(R) Black Holes: The Weyl Terms
Geraint Pratten
In this paper we revisit non-spherical perturbations of the Schwarzschild black hole in the context of gravity. Previous studies were able to demonstrate the stability of th…
Implications of pulsar timing array observations for LISA detections of massive black hole binaries
Nathan Steinle, Hannah Middleton, Christopher J. Moore +6
Pulsar timing arrays (PTAs) and the Laser Interferometer Space Antenna (LISA) will open complementary observational windows on massive black-hole binaries (MBHBs), i.e., with masse…
Tests of General Relativity with GW230529: a neutron star merging with a lower mass-gap compact object
Elise M. Sänger, Soumen Roy, Michalis Agathos +16
On May 29, 2023, the LIGO Livingston observatory detected the gravitational-wave signal GW230529_181500 from the merger of a neutron star with a lower mass-gap compact object. Its…
Post-Newtonian inspiral waveform model for eccentric precessing binaries with higher-order modes and matter effects
Gonzalo Morras, Geraint Pratten, Patricia Schmidt +1
We introduce pyEFPEHM, a post-Newtonian (PN) inspiral waveform model for eccentric and spin-precessing compact binaries that includes higher-order modes and matter effects. Accurat…
Accelerating multimodal gravitational waveforms from precessing compact binaries with artificial neural networks
Lucy M. Thomas, Geraint Pratten, Patricia Schmidt
Gravitational waves from the coalescences of black hole and neutron stars afford us the unique opportunity to determine the sources' properties, such as their masses and spins, wit…
IMRPhenomXHM: A multi-mode frequency-domain model for the gravitational wave signal from non-precessing black-hole binaries
Cecilio GarcÃa-Quirós, Marta Colleoni, Sascha Husa +5
We present the IMRPhenomXHM frequency domain phenomenological waveform model for the inspiral, merger and ringdown of quasi-circular non-precessing black hole binaries. The model e…
A generalized precession parameter to interpret gravitational-wave data
Davide Gerosa, Matthew Mould, Daria Gangardt +3
Originally designed for waveform approximants, the effective precession parameter is the most commonly used quantity to characterize spin-precession effects in grav…
Premerger observation and characterization of massive black hole binaries
Gareth Cabourn Davies, Ian Harry, Michael J. Williams +11
We demonstrate an end-to-end technique for observing and characterizing massive black hole binary signals before they merge with the LISA space-based gravitational-wave observatory…
A multipolar effective one body waveform model for spin-aligned black hole binaries
Alessandro Nagar, Gunnar Riemenschneider, Geraint Pratten +2
We introduce \TEOBiResumSM{}, an improved version of the effective-one-body (EOB) waveform model \TEOBResumS{} for spin-aligned, coalescing black hole binaries, that includes subdo…
Galaxy Clustering in 3D and Modified Gravity Theories
Dipak Munshi, Geraint Pratten, Patrick Valageas +2
We study Modified Gravity (MG) theories by modelling the redshifted matter power spectrum in a spherical Fourier-Bessel (sFB) basis. We use a fully non-linear description of the re…
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…
Improved parametrized test of general relativity using the IMRPhenomX waveform family: Including higher harmonics and precession
Soumen Roy, Maria Haney, Geraint Pratten +2
When testing general relativity (GR) with gravitational wave observations, parametrized tests of deviations from the expected strong-field source dynamics are one of the most widel…
A first survey of spinning eccentric black hole mergers: Numerical relativity simulations, hybrid waveforms, and parameter estimation
Antoni Ramos-Buades, Sascha Husa, Geraint Pratten +5
We analyze a new numerical relativity dataset of spinning but nonprecessing binary black holes on eccentric orbits, with eccentricities from approximately to , with dime…
Effect of lensing non-Gaussianity on the CMB power spectra
Antony Lewis, Geraint Pratten
Observed CMB anisotropies are lensed, and the lensed power spectra can be calculated accurately assuming the lensing deflections are Gaussian. However, the lensing deflections are…
A geometric template bank for the detection of spinning low-mass compact binaries with moderate orbital eccentricity
Khun Sang Phukon, Patricia Schmidt, Geraint Pratten
Compact binaries on eccentric orbits are another class of gravitational-wave (GW) sources that can provide a wealth of information on binary formation pathways and astrophysical en…
Simple procedures to reduce eccentricity of binary black hole simulations
Antoni Ramos-Buades, Sascha Husa, Geraint Pratten
We present simple procedures to construct quasi-circular initial data for numerical evolutions of binary black hole spacetimes. Our method consists of using Post-Newtonian theory i…
Detection of GW200105 with a targeted eccentric search
Khun Sang Phukon, Patricia Schmidt, Gonzalo Morras +1
The neutron star -- black hole (NSBH) binary GW200105 was recently found to have significant residual orbital eccentricity at a gravitational-wave frequency of 20 Hz~\cite{Morras:2…
Impact of eccentricity on the population properties of neutron star - black hole mergers
Gonzalo Morras, Geraint Pratten, Patricia Schmidt
We revisit the population properties of neutron star-black hole (NSBH) mergers using low-mass compact binary coalescences reported through GWTC-4. Employing pyEFPE, an inspiral-onl…
Constraining the lensing of binary black holes from their stochastic background
Riccardo Buscicchio, Christopher J. Moore, Geraint Pratten +3
Gravitational waves (GWs) are subject to gravitational lensing in the same way as electromagnetic radiation. However, to date, no unequivocal observation of a lensed GW transient h…
Assessing gravitational-wave binary black hole candidates with Bayesian odds
Geraint Pratten, Alberto Vecchio
Gravitational waves from the coalescence of binary black holes can be distinguished from noise transients in a detector network through Bayesian model selection by exploiting the c…
Mapping eccentricity evolutions between numerical relativity and effective-one-body gravitational waveforms
Alice Bonino, Patricia Schmidt, Geraint Pratten
Orbital eccentricity in compact binaries is considered to be a key tracer of their astrophysical origin, and can be inferred from gravitational-wave observations due to its imprint…
General-relativistic precession in a black-hole binary
Mark Hannam, Charlie Hoy, Jonathan E. Thompson +24
The general-relativistic phenomenon of spin-induced orbital precession has not yet been observed in strong-field gravity. Gravitational-wave observations of binary black holes (BBH…
Gravitational-Wave Asteroseismology with Fundamental Modes from Compact Binary Inspirals
Geraint Pratten, Patricia Schmidt, Tanja Hinderer
The first detection of gravitational waves (GWs) from the binary neutron star (NS) inspiral GW170817 has opened a unique channel for probing the fundamental properties of matter at…
LISA science ground segment conventions
Quentin Baghi, Stanislas Babak, Leor Barack +22
This document sets out the conventions used for data simulations, waveforms, and analysis pipelines within the Distributed Data Processing Centre (DDPC) of the Laser Interferometer…
Cosmology with the Laser Interferometer Space Antenna
Pierre Auclair, David Bacon, Tessa Baker +177
The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravita…
On the LISA science performance in observations of short-lived signals from massive black hole binary coalescences
Geraint Pratten, Antoine Klein, Christopher J. Moore +4
The observation of massive black hole binary systems is one of the main science objectives of the Laser Interferometer Space Antenna (LISA). The instrument's design requirements ha…
New gravitational waveform model for precessing binary neutron stars with double-spin effects
Marta Colleoni, Felip A. Ramis Vidal, Nathan K. Johnson-McDaniel +3
We present two new frequency-domain gravitational waveform models for the analysis of signals emitted by binary neutron star coalescences: IMRPhenomXAS_NRTidalv2 and IMRPhenomXP_NR…
Extreme Gravity and Fundamental Physics
B. S. Sathyaprakash, Alessandra Buonanno, Luis Lehner +26
Future gravitational-wave observations will enable unprecedented and unique science in extreme gravity and fundamental physics answering questions about the nature of dynamical spa…
Rapid model comparison of equations of state from gravitational wave observation of binary neutron star coalescences
Shaon Ghosh, Xiaoshu Liu, Jolien Creighton +3
The discovery of the coalescence of binary neutron star GW170817 was a watershed moment in the field of gravitational wave astronomy. Among the rich variety of information that we…
The last three years: multiband gravitational-wave observations of stellar-mass binary black holes
Antoine Klein, Geraint Pratten, Riccardo Buscicchio +10
Understanding the formation and evolution of the stellar-mass binary black holes discovered by LIGO and Virgo is a challenge that spans many areas of astrophysics, from stellar evo…
Impact of post-Born lensing on the CMB
Geraint Pratten, Antony Lewis
Lensing of the CMB is affected by post-Born lensing, producing corrections to the convergence power spectrum and introducing field rotation. We show numerically that the lensing co…
Impact of Dynamical Tides on the Reconstruction of the Neutron Star Equation of State
Geraint Pratten, Patricia Schmidt, Natalie Williams
Gravitational waves (GWs) from inspiralling neutron stars afford us a unique opportunity to infer the as-of-yet unknown equation of state of cold hadronic matter at supranuclear de…