Direct measurements of the speed of gravitational waves using the Decihertz Interferometer Gravitational Wave Observatory
In this Letter, we propose a new model-independent strategy for a direct measurement of the speed of gravitational waves v g based on the DECi-hertz Interferometer Gravitational-wave Observatory (DECIGO), a future Japanese space gravitational-wave antenna. Our methodology leverages DECIGO’s ability...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:dnet:digitalcsic_::3ac476eeb6df354955a46ec6fb934bef |
| Acceso en línea: | http://hdl.handle.net/10261/427543 https://www.scopus.com/inward/record.uri?eid=2-s2.0-105023831576&doi=10.1051%2F0004-6361%2F202557034&partnerID=40&md5=8bc7cd2003ededca720614d66d24c37c |
| Access Level: | acceso abierto |
| Palabra clave: | Gravitational waves |
| Sumario: | In this Letter, we propose a new model-independent strategy for a direct measurement of the speed of gravitational waves v g based on the DECi-hertz Interferometer Gravitational-wave Observatory (DECIGO), a future Japanese space gravitational-wave antenna. Our methodology leverages DECIGO’s ability to measure the cosmological distance D L (z) and the cosmic expansion rate H(z) at the same redshift. Each binary neutron star (BNS) inspiral creates a valuable opportunity for a direct measurement of the speed of gravitational waves (GWs) at different redshifts and directions in the sky. In the DECIGO low-frequency band, observation of BNSs during a one-year mission would produce robust measurements of the absolute value of v g with an accuracy at the 10−5 level. Such assessments of v g in the low-frequency domain improve by three orders of magnitude over other direct methods based on ground-based GW detectors (in the high-frequency domain). If General Relativity is not the ultimate theory of gravity, DECIGO will provide the evidence of its failure through a one-year observation of BNS events. © The Authors 2025. |
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