Gravitational-wave Research
Lead Research Organisation:
CARDIFF UNIVERSITY
Department Name: School of Physics and Astronomy
Abstract
Information Already Provided.
Organisations
- CARDIFF UNIVERSITY (Lead Research Organisation)
- Max Planck Society (Collaboration)
- UNIVERSITY OF BIRMINGHAM (Collaboration)
- University of the West of Scotland (Collaboration)
- University of the Balearic Islands (Collaboration)
- University of Glasgow (Collaboration)
- LIGO scientific collaboration (Collaboration)
Publications
Burns E
(2019)
A Fermi Gamma-Ray Burst Monitor Search for Electromagnetic Signals Coincident with Gravitational-wave Candidates in Advanced LIGO's First Observing Run
in The Astrophysical Journal
Chatziioannou K
(2019)
On the properties of the massive binary black hole merger GW170729
in Physical Review D
Collaboration T
(2021)
Searches for Gravitational Waves from Known Pulsars at Two Harmonics in the Second and Third LIGO-Virgo Observing Runs
in arXiv e-prints
Collaboration T
(2021)
Search for continuous gravitational waves from 20 accreting millisecond X-ray pulsars in O3 LIGO data
in arXiv e-prints
Collaboration T
(2022)
All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO and Advanced Virgo O3 data
in arXiv e-prints
Collaboration T
(2021)
Narrowband searches for continuous and long-duration transient gravitational waves from known pulsars in the LIGO-Virgo third observing run
in arXiv e-prints
Collaboration T
(2021)
Search for subsolar-mass binaries in the first half of Advanced LIGO and Virgo's third observing run
in arXiv e-prints
Collaboration T
(2022)
Search for gravitational waves from Scorpius X-1 with a hidden Markov model in O3 LIGO data
in arXiv e-prints
Collaboration T
(2021)
All-sky search for long-duration gravitational-wave bursts in the third Advanced LIGO and Advanced Virgo run
in arXiv e-prints
Collaboration T
(2021)
All-sky search for gravitational wave emission from scalar boson clouds around spinning black holes in LIGO O3 data
in arXiv e-prints
Collaboration T
(2021)
Search of the Early O3 LIGO Data for Continuous Gravitational Waves from the Cassiopeia A and Vela Jr. Supernova Remnants
in arXiv e-prints
Collaboration T
(2021)
Constraints on dark photon dark matter using data from LIGO's and Virgo's third observing run
in arXiv e-prints
Collaboration T
(2021)
Search for lensing signatures in the gravitational-wave observations from the first half of LIGO-Virgo's third observing run
in arXiv e-prints
Collaboration T
(2021)
All-sky search for short gravitational-wave bursts in the third Advanced LIGO and Advanced Virgo run
in arXiv e-prints
Collaboration T
(2021)
Search for Gravitational Waves Associated with Gamma-Ray Bursts Detected by Fermi and Swift During the LIGO-Virgo Run O3b
in arXiv e-prints
Collaboration T
(2021)
All-sky, all-frequency directional search for persistent gravitational-waves from Advanced LIGO's and Advanced Virgo's first three observing runs
in arXiv e-prints
D'Emilio V
(2021)
Density estimation with Gaussian processes for gravitational wave posteriors
in Monthly Notices of the Royal Astronomical Society
Hamburg R
(2020)
A Joint Fermi-GBM and LIGO/Virgo Analysis of Compact Binary Mergers from the First and Second Gravitational-wave Observing Runs
in The Astrophysical Journal
Hannam Mark
(2021)
Measurement of general-relativistic precession in a black-hole binary
in arXiv e-prints
Hernandez Vivanco F
(2019)
Measuring the neutron star equation of state with gravitational waves: The first forty binary neutron star merger observations
in Physical Review D
Hoy C
(2021)
PESummary: The code agnostic Parameter Estimation Summary page builder
in SoftwareX
Kalaghatgi C
(2020)
Parameter estimation with a spinning multimode waveform model
in Physical Review D
Morisaki S
(2020)
Rapid parameter estimation of gravitational waves from binary neutron star coalescence using focused reduced order quadrature
in Physical Review D
Morisaki S
(2020)
Prompt and accurate sky localization of gravitational-wave sources
in Journal of Physics: Conference Series
Morisaki Soichiro
(2020)
Prompt and accurate sky localization of gravitational-wave sources
in Gamma-ray Bursts in the Gravitational Wave Era 2019
Qi H
(2021)
Python-based reduced order quadrature building code for fast gravitational wave inference
in Physical Review D
Relton P
(2022)
Addressing the challenges of detecting time-overlapping compact binary coalescences
in Physical Review D
Relton P
(2021)
Parameter estimation bias from overlapping binary black hole events in second generation interferometers
in Physical Review D
Rich Abbott
(2021)
Open data from the first and second observing runs of Advanced LIGO and Advanced Virgo
in SoftwareX
Romero-Shaw I
(2020)
Bayesian inference for compact binary coalescences with bilby : validation and application to the first LIGO-Virgo gravitational-wave transient catalogue
in Monthly Notices of the Royal Astronomical Society
Soares-Santos M
(2019)
First Measurement of the Hubble Constant from a Dark Standard Siren using the Dark Energy Survey Galaxies and the LIGO/Virgo Binary-Black-hole Merger GW170814
in The Astrophysical Journal Letters
The LIGO Scientific Collaboration
(2019)
Search for intermediate mass black hole binaries in the first and second observing runs of the Advanced LIGO and Virgo network
The LIGO Scientific Collaboration
(2021)
GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run
The LIGO Scientific Collaboration
(2021)
The population of merging compact binaries inferred using gravitational waves through GWTC-3
The LIGO Scientific Collaboration
(2021)
GWTC-2.1: Deep Extended Catalog of Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run
The LIGO Scientific Collaboration
(2019)
All-sky search for short gravitational-wave bursts in the second Advanced LIGO and Advanced Virgo run
The LIGO Scientific Collaboration
(2021)
Constraints on the cosmic expansion history from GWTC-3
The LIGO Scientific Collaboration
(2021)
Tests of General Relativity with GWTC-3
Vermeulen SM
(2021)
Direct limits for scalar field dark matter from a gravitational-wave detector.
in Nature
| Description | We made very significant contributions to signal characterisation and astrophysical inference of gravitational-wave observations by the LIGO-Virgo Collaboration. In particular our contributions were instrumental in the characterisation of the first multi-messenger detection: GW170817. This collaboration work was complemented by independent investigations on the high-mass event GW170729 and on instrumental effects and their mitigation for GW170817. We contributed to the analysis of GW190521, the most massive binary black-hole to date at 150 solar masses, that of GW190814, an exceptional 23 solar masses and 2.6 solar masses binary, GW190412: a high mass-ratio binary black-hole, and GW190425, an unusually heavy binary neutron-star with a mass of 3.4 solar masses. Furthermore we developed Reduced Order Quadratures (ROQ) rules for gravitational-wave analysis, which allow for speed-up of several orders of magnitude in parameter estimation analyses. From this work we have created a python-based framework to compute rules for new waveform models: PyROQ, which enables faster deployment of such rules than previously. This software has been used in several studies, constructing ROQs for several gravitational-wave signal models. We also characterised the spin measurement capabilities of early advanced LIGO, informing requirements for detector commissioning, waveform models, and population studies. We characterised the impact of higher-mode physics on parameter inference, identifying the potential biases for future observations and waveform model developments. And using machine-learning techniques we showed the future of binary neutron star equation-of-state inference: we built a new approach to combine the posterior from individual neutron-star observations, solving the issue of the limited number of posterior samples. This paves the way towards ground-breaking measurement of the state of matter at supranuclear densities. The new era of the field requires an adaptation of the scientific tools used. We developed a new post-processing library, PESummary, now a reference for the world-wide community. In addition, the next generation parameter estimation software is being developed with the expertise of the Cardiff group. We showed the benefits of fast three-dimensional localisation of gravitational-wave sources to greatly increase the likelihood of identifying an electromagnetic counterpart. Furthering this work, we developed a new method for fast localisation, Focused Reduced Order Quadrature (FROQ), enabling accurate sky-localisation of binary neutron star sources in minutes, while including key information about their masses and orientation on the same time-scale. This analysis provides an estimate of the sky location of gravitational-wave sources in minutes that is more accurate than faster approximate methods. GW170817 demonstrated the great potential of multi-messenger astronomy, and that accurate localisation in minutes is key. |
| Exploitation Route | All results are public, including data and software, via github/zenodo resources linked from all relevant published work. |
| Sectors | Digital/Communication/Information Technologies (including Software) Financial Services and Management Consultancy |
| Description | Our findings in using high-performance computing for gravitational-wave data analysis have been used by, for instance, the Oracle corporation for their cloud computing efforts. |
| First Year Of Impact | 2020 |
| Sector | Digital/Communication/Information Technologies (including Software) |
| Impact Types | Economic |
| Description | Advanced LIGO Operations Support |
| Amount | £1,259,847 (GBP) |
| Funding ID | ST/V001337/1 |
| Organisation | Science and Technologies Facilities Council (STFC) |
| Sector | Public |
| Country | United Kingdom |
| Start | 01/2020 |
| End | 09/2023 |
| Description | GEO600 |
| Organisation | Max Planck Society |
| Department | Max Planck Institute for Gravitational Physics |
| Country | Germany |
| Sector | Academic/University |
| PI Contribution | Detector characterisation and data analysis; strategic plans, scientific motivation for improving detector sensitivity. |
| Collaborator Contribution | Building, maintaining, and operating the detector, detector characterisation and data analysis. |
| Impact | A working gravitational wave detector, development of advanced technology for advanced and third generation detectors. |
| Description | GEO600 |
| Organisation | University of Birmingham |
| Country | United Kingdom |
| Sector | Academic/University |
| PI Contribution | Detector characterisation and data analysis; strategic plans, scientific motivation for improving detector sensitivity. |
| Collaborator Contribution | Building, maintaining, and operating the detector, detector characterisation and data analysis. |
| Impact | A working gravitational wave detector, development of advanced technology for advanced and third generation detectors. |
| Description | GEO600 |
| Organisation | University of Glasgow |
| Country | United Kingdom |
| Sector | Academic/University |
| PI Contribution | Detector characterisation and data analysis; strategic plans, scientific motivation for improving detector sensitivity. |
| Collaborator Contribution | Building, maintaining, and operating the detector, detector characterisation and data analysis. |
| Impact | A working gravitational wave detector, development of advanced technology for advanced and third generation detectors. |
| Description | GEO600 |
| Organisation | University of the Balearic Islands |
| Country | Spain |
| Sector | Academic/University |
| PI Contribution | Detector characterisation and data analysis; strategic plans, scientific motivation for improving detector sensitivity. |
| Collaborator Contribution | Building, maintaining, and operating the detector, detector characterisation and data analysis. |
| Impact | A working gravitational wave detector, development of advanced technology for advanced and third generation detectors. |
| Description | GEO600 |
| Organisation | University of the West of Scotland |
| Country | United Kingdom |
| Sector | Academic/University |
| PI Contribution | Detector characterisation and data analysis; strategic plans, scientific motivation for improving detector sensitivity. |
| Collaborator Contribution | Building, maintaining, and operating the detector, detector characterisation and data analysis. |
| Impact | A working gravitational wave detector, development of advanced technology for advanced and third generation detectors. |
| Description | LIGO Scientific Collaboration |
| Organisation | LIGO Scientific Collaboration |
| Country | United States |
| Sector | Academic/University |
| PI Contribution | Search algorithms and software, data analysis and astrophysical interpretation, scientific motivation for improvement in detector sensitivity |
| Collaborator Contribution | Building, maintaining, and operating the LIGO detectors |
| Impact | Publications, conference plenaries, conference contributions |
| Title | Gravitational Wave Analysis Software |
| Description | Software to perform parameter estimation and model selection, especially (but not limited to) for gravitational waves emitted by merging black holes and neutron stars. |
| Type Of Technology | Software |
| Year Produced | 2019 |
| Open Source License? | Yes |
| Impact | Next generation software to be used by the LIGO-Virgo collaboration in the analysis of gravitational waves. |
| URL | https://lscsoft.docs.ligo.org/bilby/index.html |
| Description | Interview for national and international news |
| Form Of Engagement Activity | A press release, press conference or response to a media enquiry/interview |
| Part Of Official Scheme? | No |
| Geographic Reach | International |
| Primary Audience | Media (as a channel to the public) |
| Results and Impact | Interview in both print media (BBC, The Guardian) and local TV (BBC Wales) on gravitational-wave analysis results. https://www.bbc.co.uk/news/science-environment-57639520 https://www.theguardian.com/science/2021/jun/29/gravitational-waves-from-star-eating-black-holes-detected-on-earth |
| Year(s) Of Engagement Activity | 2021 |
| URL | https://www.bbc.co.uk/news/science-environment-57639520 |
| Description | Presentations at the Cardiff University Open Day |
| Form Of Engagement Activity | Participation in an open day or visit at my research institution |
| Part Of Official Scheme? | No |
| Geographic Reach | National |
| Primary Audience | Undergraduate students |
| Results and Impact | Presentations to prospective undergraduate students at the Cardiff University Open Day, Cardiff, UK. Title: Exploding stars, black holes and gravitational waves. |
| Year(s) Of Engagement Activity | 2018,2019,2020,2021,2022 |
| Description | Public outreach presentation at the Cardiff, Bristol and Bath Astronomical Societies |
| Form Of Engagement Activity | A talk or presentation |
| Part Of Official Scheme? | No |
| Geographic Reach | Regional |
| Primary Audience | Public/other audiences |
| Results and Impact | Presentation on gravitational-wave research titled "Stellar-size Black holes" at a joint event of the Bath, Bristol and Cardiff astronomical societies |
| Year(s) Of Engagement Activity | 2021 |
| URL | https://www.eventbrite.co.uk/e/extreme-stellar-environments-tickets-169977235487 |