Publications (18)
Phenomenological model for the gravitational-wave signal from precessing binary black holes with two-spin effects
Sebastian Khan, Katerina Chatziioannou, Mark Hannam +1
The properties of compact binaries, such as masses and spins, are imprinted in the gravitational-waves they emit and can be measured using parameterised waveform models. Accurately…
First higher-multipole model of gravitational waves from spinning and coalescing black-hole binaries
Lionel London, Sebastian Khan, Edward Fauchon-Jones +7
Gravitational-wave observations of binary black holes currently rely on theoretical models that predict the dominant multipoles (l,m) of the radiation during inspiral, merger and r…
Probabilistic Model for the Gravitational Wave Signal from Merging Black Holes
Sebastian Khan
Parameterised models that predict the gravitational-wave (GW) signal from merging black holes are used to extract source properties from GW observations. The majority of research i…
The final twist: A model of gravitational waves from precessing black-hole binaries through merger and ringdown
Eleanor Hamilton, Lionel London, Jonathan E. Thompson +6
We present PhenomPNR, a frequency-domain phenomenological model of the gravitational-wave (GW) signal from binary-black-hole mergers that is tuned to numerical relativity (NR) simu…
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…
Modeling the gravitational wave signature of neutron star black hole coalescences: PhenomNSBH
Jonathan E. Thompson, Edward Fauchon-Jones, Sebastian Khan +4
Accurate gravitational-wave (GW) signal models exist for black hole binary (BBH) and neutron-star binary (BNS) systems, which are consistent with all of the published GW observatio…
Multi-waveform inference of gravitational waves
Gregory Ashton, Sebastian Khan
Bayesian inference of gravitational wave signals is subject to systematic error due to modelling uncertainty in waveform signal models, coined approximants. A growing collection of…
Hierarchical data-driven approach to fitting numerical relativity data for nonprecessing binary black holes with an application to final spin and radiated energy
Xisco Jiménez-Forteza, David Keitel, Sascha Husa +3
Numerical relativity is an essential tool in studying the coalescence of binary black holes (BBHs). It is still computationally prohibitive to cover the BBH parameter space exhaust…
Improving the NRTidal model for binary neutron star systems
Tim Dietrich, Anuradha Samajdar, Sebastian Khan +3
Accurate and fast gravitational waveform (GW) models are essential to extract information about the properties of compact binary systems that generate GWs. Building on previous wor…
A catalogue of precessing black-hole-binary numerical-relativity simulations
Eleanor Hamilton, Edward Fauchon-Jones, Mark Hannam +9
We present a public catalogue of numerical-relativity binary-black-hole simulations. The catalogue contains datasets from 80 distinct configurations of precessing binary-black-hole…
Matter imprints in waveform models for neutron star binaries: tidal and self-spin effects
Tim Dietrich, Sebastian Khan, Reetika Dudi +16
The combined observation of gravitational and electromagnetic waves from the coalescence of two neutron stars marks the beginning of multi-messenger astronomy with gravitational wa…
Frequency-domain gravitational waves from non-precessing black-hole binaries. I. New numerical waveforms and anatomy of the signal
Sascha Husa, Sebastian Khan, Mark Hannam +4
In this paper we discuss the anatomy of frequency-domain gravitational-wave signals from non-precessing black-hole coalescences with the goal of constructing accurate phenomenologi…
Frequency-domain gravitational waves from non-precessing black-hole binaries. II. A phenomenological model for the advanced detector era
Sebastian Khan, Sascha Husa, Mark Hannam +4
We present a new frequency-domain phenomenological model of the gravitational-wave signal from the inspiral, merger and ringdown of non-precessing (aligned-spin) black-hole binarie…
What no one has seen before: gravitational waveforms from warp drive collapse
Katy Clough, Tim Dietrich, Sebastian Khan
Despite originating in science fiction, warp drives have a concrete description in general relativity, with Alcubierre first proposing a spacetime metric that supported faster-than…
Gravitational-wave surrogate models powered by artificial neural networks: The ANN-Sur for waveform generation
Sebastian Khan, Rhys Green
Inferring the properties of black holes and neutron stars is a key science goal of gravitational-wave (GW) astronomy. To extract as much information as possible from GW observation…
Including higher order multipoles in gravitational-wave models for precessing binary black holes
Sebastian Khan, Frank Ohme, Katerina Chatziioannou +1
Estimates of the source parameters of gravitational-wave (GW) events produced by compact binary mergers rely on theoretical models for the GW signal. We present the first frequency…
On the properties of the massive binary black hole merger GW170729
Katerina Chatziioannou, Roberto Cotesta, Sudarshan Ghonge +53
We present a detailed investigation into the properties of GW170729, the gravitational wave with the most massive and distant source confirmed to date. We employ an extensive set o…
Enhancing gravitational waveform models through dynamic calibration
Yoshinta Eka Setyawati, Frank Ohme, Sebastian Khan
Strategies to model the inspiral, merger and ringdown gravitational waveform of coalescing binaries are restricted in parameter space by the coverage of available numerical-relativ…