Synergy between CSST galaxy survey and gravitational-wave observation: Inferring the Hubble constant from dark standard sirens
| Autor: | Song, Ji-Yu, Wang, Ling-Feng, Li, Yichao, Zhao, Ze-Wei, Zhang, Jing-Fei, Zhao, Wen, Zhang, Xin |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Sci. China-Phys. Mech. Astron. 67, 230411 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1007/s11433-023-2260-2 |
| Popis: | Gravitational waves (GWs) from compact binary coalescences encode the absolute luminosity distances of GW sources. Once the redshifts of GW sources are known, one can use the distance-redshift relation to constrain cosmological parameters. One way to obtain the redshifts is to localize GW sources by GW observations and then use galaxy catalogs to determine redshifts from a statistical analysis of redshift information of the potential host galaxies, commonly referred to as the dark siren method. The third-generation (3G) GW detectors are planned to work in the 2030s and will observe numerous compact binary coalescences. Using these GW events as dark sirens requires high-quality galaxy catalogs from future sky survey projects. The China Space Station Telescope (CSST) will be launched in 2024 and will observe billions of galaxies within a 17500 deg$^2$ survey area with redshift up to $z\sim 4$, providing photometric and spectroscopic galaxy catalogs. In this work, we simulate the CSST galaxy catalogs and the 5-year GW data from the 3G GW detectors and combine them to infer the Hubble constant ($H_0$). Our results show that the measurement precision of $H_0$ could reach the sub-percent level, meeting the standard of precision cosmology. We conclude that the synergy between CSST and the 3G GW detectors is of great significance in measuring the Hubble constant. Comment: 13 pages, 5 figures; accepted for publication in Science China Physics, Mechanics & Astronomy |
| Databáze: | arXiv |
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