Chen, A., Gray, R. and Baker, T. (2024) Testing the nature of gravitational wave propagation using dark sirens and galaxy catalogues. Journal of Cosmology and Astroparticle Physics, 2024(02), 035. (doi: 10.1088/1475-7516/2024/02/035)
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Abstract
The dark sirens method enables us to use gravitational wave events without electromagnetic counterparts as tools for cosmology and tests of gravity. Furthermore, the dark sirens analysis code gwcosmo can now robustly account for information coming from both galaxy catalogues and the compact object mass distribution. We present here an extension of the gwcosmo code and methodology to constrain parameterized deviations from General Relativity that affect the propagation of gravitational waves under the ΛCDM expansion history of the universe. We show results of our analysis using data from the GWTC-3 gravitational wave catalogues, in preparation for application to the O4 observing run. After testing our pipelines using the First Two Years mock data set, we reanalyse 46 events from GWTC-3, and combine the posterior for BBH and NSBH sampling results for the first time. We obtain joint constraints on H0 and parameterized deviations from General Relativity in the Power Law + Peak BBH population model. With increased galaxy catalogue support in the future, our work sets the stage for dark sirens to become a powerful tool for testing gravity.
| Item Type: | Articles |
|---|---|
| Additional Information: | A.C. is supported by a PhD grant from the Chinese Scholarship Council (grant no. 202008060014), and the STSM GravNet grant during his visit to the NBI. The research of R.G. was supported by ERC Starting Grant SHADE 949572 and STFC grant ST/V005634/1. T.B. is supported by ERC Starting Grant SHADE (grant no. StG 949572) and a Royal Society University Research Fellowship (grant no. URF\R1\180009). |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Gray, Dr Rachel |
| Authors: | Chen, A., Gray, R., and Baker, T. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Research Centre: | College of Science and Engineering > School of Physics and Astronomy > Institute for Gravitational Research |
| Journal Name: | Journal of Cosmology and Astroparticle Physics |
| Publisher: | IOP Publishing |
| ISSN: | 1475-7516 |
| ISSN (Online): | 1475-7516 |
| Published Online: | 22 February 2024 |
| Copyright Holders: | Copyright © 2024 The Author(s) |
| First Published: | First published in Journal of Cosmology and Astroparticle Physics 2024(02):035 |
| Publisher Policy: | Reproduced under a Creative Commons license |
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