Unveiling a multi-component stochastic gravitational-wave background with the TianQin + LISA network
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2024
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866912232647950336 |
|---|---|
| author | Liang, Zheng-Cheng Li, Zhi-Yuan Li, En-Kun Zhang, Jian-dong Hu, Yi-Ming |
| author_facet | Liang, Zheng-Cheng Li, Zhi-Yuan Li, En-Kun Zhang, Jian-dong Hu, Yi-Ming |
| contents | Space-borne detectors, including TianQin and Laser Interferometry Space Antenna (LISA), are tasked with simultaneously observing the Galactic foreground, astrophysical and cosmological stochastic gravitational-wave backgrounds (SGWBs). For the first time, we employ a space-borne detector network to identify these SGWBs. Specifically, we develop a tailored likelihood for cross-correlation detection with such networks. Combined with the likelihood, we use the simulated datasets of the TianQin + LISA network to conduct an analysis for model selection and parameter estimation. In our analysis, we adopt an astrophysical background originating from extragalactic white-dwarf binaries, along with a flat cosmological background associated with the early Universe. Our results indicate that, after 4 years of operation, the network could detect a single SGWB from either astrophysical or cosmological origins, with an energy density $Ω_{\rm ast/cos}$ (10 mHz) on the order of $10^{-12}$, despite the presence of a Galactic foreground. Furthermore, to distinguish the cosmological background from both a Galactic foreground and an extragalactic background produced by white-dwarf binaries, the energy density $Ω_{\rm cos}$ should reach around $2\times 10^{-11}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_00778 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Unveiling a multi-component stochastic gravitational-wave background with the TianQin + LISA network Liang, Zheng-Cheng Li, Zhi-Yuan Li, En-Kun Zhang, Jian-dong Hu, Yi-Ming General Relativity and Quantum Cosmology Space-borne detectors, including TianQin and Laser Interferometry Space Antenna (LISA), are tasked with simultaneously observing the Galactic foreground, astrophysical and cosmological stochastic gravitational-wave backgrounds (SGWBs). For the first time, we employ a space-borne detector network to identify these SGWBs. Specifically, we develop a tailored likelihood for cross-correlation detection with such networks. Combined with the likelihood, we use the simulated datasets of the TianQin + LISA network to conduct an analysis for model selection and parameter estimation. In our analysis, we adopt an astrophysical background originating from extragalactic white-dwarf binaries, along with a flat cosmological background associated with the early Universe. Our results indicate that, after 4 years of operation, the network could detect a single SGWB from either astrophysical or cosmological origins, with an energy density $Ω_{\rm ast/cos}$ (10 mHz) on the order of $10^{-12}$, despite the presence of a Galactic foreground. Furthermore, to distinguish the cosmological background from both a Galactic foreground and an extragalactic background produced by white-dwarf binaries, the energy density $Ω_{\rm cos}$ should reach around $2\times 10^{-11}$. |
| title | Unveiling a multi-component stochastic gravitational-wave background with the TianQin + LISA network |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2409.00778 |