Reducing cosmological degeneracies by combining multiple classes of LISA gravitational-wave standard sirens
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arXiv
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| Auteurs principaux: | , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866914420169375744 |
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| author | Laghi, Danny Tamanini, Nicola Sesana, Alberto Gair, Jonathan Barausse, Enrico Caprini, Chiara Del Pozzo, Walter Mangiagli, Alberto Marsat, Sylvain |
| author_facet | Laghi, Danny Tamanini, Nicola Sesana, Alberto Gair, Jonathan Barausse, Enrico Caprini, Chiara Del Pozzo, Walter Mangiagli, Alberto Marsat, Sylvain |
| contents | We present the first joint gravitational-wave cosmological inference with LISA extreme mass-ratio inspirals at $z\lesssim1$ (galaxy redshifts) and massive black hole binaries at $z\gtrsim1$ (electromagnetic counterparts). Combining these standard sirens reduces cosmological degeneracies and yields competitive constraints on the Hubble constant $H_0$ and the dark-energy equation-of-state parameter $w_0$. This highlights LISA's potential for late-time cosmology across a broad redshift range with systematics distinct from electromagnetic distance indicators. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_23612 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Reducing cosmological degeneracies by combining multiple classes of LISA gravitational-wave standard sirens Laghi, Danny Tamanini, Nicola Sesana, Alberto Gair, Jonathan Barausse, Enrico Caprini, Chiara Del Pozzo, Walter Mangiagli, Alberto Marsat, Sylvain Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology We present the first joint gravitational-wave cosmological inference with LISA extreme mass-ratio inspirals at $z\lesssim1$ (galaxy redshifts) and massive black hole binaries at $z\gtrsim1$ (electromagnetic counterparts). Combining these standard sirens reduces cosmological degeneracies and yields competitive constraints on the Hubble constant $H_0$ and the dark-energy equation-of-state parameter $w_0$. This highlights LISA's potential for late-time cosmology across a broad redshift range with systematics distinct from electromagnetic distance indicators. |
| title | Reducing cosmological degeneracies by combining multiple classes of LISA gravitational-wave standard sirens |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2603.23612 |