Inferring the cosmological constant in early Universe only by gravitational waves
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866912199253950464 |
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| author | Li, Song Han, Wen-Biao |
| author_facet | Li, Song Han, Wen-Biao |
| contents | The expansion of the Universe is accelerating which can be interpreted as due to the cosmological constant $Λ$. In this study, we investigate the behavior of gravitational waves in the presence of a cosmological constant in the early universe. We rigorously analyze the merger rate of binary primordial black holes (PBHs) and the corresponding signal-to-noise ratio within the framework of Laser Interferometer Space Antenna (LISA). We find that binary PBHs with a total mass of $M_{\mathrm{tot}}=1000M_{\odot}$ and a redshift larger than $z=500$ are the ideal system for studying the effect of the cosmological constant through LISA. By computing the fisher information matrix, we establish that the cosmological constant can be effectively constrained. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_12608 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Inferring the cosmological constant in early Universe only by gravitational waves Li, Song Han, Wen-Biao General Relativity and Quantum Cosmology The expansion of the Universe is accelerating which can be interpreted as due to the cosmological constant $Λ$. In this study, we investigate the behavior of gravitational waves in the presence of a cosmological constant in the early universe. We rigorously analyze the merger rate of binary primordial black holes (PBHs) and the corresponding signal-to-noise ratio within the framework of Laser Interferometer Space Antenna (LISA). We find that binary PBHs with a total mass of $M_{\mathrm{tot}}=1000M_{\odot}$ and a redshift larger than $z=500$ are the ideal system for studying the effect of the cosmological constant through LISA. By computing the fisher information matrix, we establish that the cosmological constant can be effectively constrained. |
| title | Inferring the cosmological constant in early Universe only by gravitational waves |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2501.12608 |