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Testing gravitational wave propagation with multiband detections
Journal of Cosmology and Astroparticle Physics, Volume: 2023, Issue: 03, Start page: 044
Swansea University Author:
Gianmassimo Tasinato
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DOI (Published version): 10.1088/1475-7516/2023/03/044
Abstract
Effective field theories (EFT) of dark energy (DE) — built to parameterise the properties of DE in an agnostic manner — are severely constrained by measurements of the propagation speed of gravitational waves (GW). However, GW frequencies probed by ground-based interferometers lie around the typical...
| Published in: | Journal of Cosmology and Astroparticle Physics |
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| ISSN: | 1475-7516 |
| Published: |
IOP Publishing
2023
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa63072 |
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| Abstract: |
Effective field theories (EFT) of dark energy (DE) — built to parameterise the properties of DE in an agnostic manner — are severely constrained by measurements of the propagation speed of gravitational waves (GW). However, GW frequencies probed by ground-based interferometers lie around the typical strong coupling scale of the EFT, and it is likely that the effective description breaks down before even reaching that scale. We discuss how this leaves the possibility that an appropriate ultraviolet completion of DE scenarios, valid at scales beyond an EFT description, can avoid present constraints on the GW speed. Instead, additional constraints in the lower frequency LISA band would be harder to escape, since the energies involved are orders of magnitude lower. By implementing a method based on GW multiband detections, we show indeed that a single joint observation of a GW150914-like event by LISA and a terrestrial interferometer would allow one to constrain the speed of light and gravitons to match to within 10-15. Multiband GW observations can therefore firmly constrain scenarios based on the EFT of DE, in a robust and unambiguous way. |
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| Keywords: |
Gravitational waves in GR and beyond : theory , modified gravity, gravitationalwave detectors, gravitational waves / theory |
| College: |
Faculty of Science and Engineering |
| Funders: |
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). E.B. acknowledges
support from the European Union’s H2020 ERC Consolidator Grant “GRavity from Astrophysical to Microscopic Scales” (Grant No. GRAMS-815673) and the EU Horizon 2020
Research and Innovation Programme under the Marie Sklodowska-Curie Grant Agreement
No. 101007855. A.C. is supported by a PhD grant from the Chinese Scholarship Council
– 11 –
JCAP03(2023)044
(grant no.202008060014). CdR acknowledges support from a Wolfson Research Merit Award,
the Simons Foundation award ID 555326 under the Simons Foundation Origins of the Universe initiative, Cosmology Beyond Einstein’s Theory and the Simons Investigator award
690508. CdR and M.P. are also funded by STFC grants ST/P000762/1 and ST/T000791/1
as well as by the European Union’s Horizon 2020 Research Council grant 724659 MassiveCosmo ERC-2016-COG. G.T. is partially funded by the STFC grant ST/T000813/1. |
| Issue: |
03 |
| Start Page: |
044 |