Progress toward the detection of the gravitational-wave background from stellar-mass binary black holes: a mock data challenge
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2025
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| author | Kou, Xiao-Xiao Saleem, Muhammed Mandic, Vuk Talbot, Colm Thrane, Eric |
| author_facet | Kou, Xiao-Xiao Saleem, Muhammed Mandic, Vuk Talbot, Colm Thrane, Eric |
| contents | While the third LIGO--Virgo gravitational-wave transient catalog includes 90 signals, it is believed that ${\cal O}(10^5)$ binary black holes merge somewhere in the Universe every year. Although these signals are too weak to be detected individually with current observatories, they combine to create a stochastic background, which is potentially detectable in the near future. LIGO--Virgo searches for the gravitational-wave background using cross-correlation have so far yielded upper limits. However, Smith \& Thrane (2017) showed that a vastly more sensitive ``coherent'' search can be carried out by incorporating information about the phase evolution of binary black hole signals. This improved sensitivity comes at a cost; the coherent method is computationally expensive and requires a far more detailed understanding of systematic errors than is required for the cross-correlation search. In this work, we demonstrate the coherent approach with realistic data, paving the way for a gravitational-wave background search with unprecedented sensitivity. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2506_14179 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Progress toward the detection of the gravitational-wave background from stellar-mass binary black holes: a mock data challenge Kou, Xiao-Xiao Saleem, Muhammed Mandic, Vuk Talbot, Colm Thrane, Eric General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena While the third LIGO--Virgo gravitational-wave transient catalog includes 90 signals, it is believed that ${\cal O}(10^5)$ binary black holes merge somewhere in the Universe every year. Although these signals are too weak to be detected individually with current observatories, they combine to create a stochastic background, which is potentially detectable in the near future. LIGO--Virgo searches for the gravitational-wave background using cross-correlation have so far yielded upper limits. However, Smith \& Thrane (2017) showed that a vastly more sensitive ``coherent'' search can be carried out by incorporating information about the phase evolution of binary black hole signals. This improved sensitivity comes at a cost; the coherent method is computationally expensive and requires a far more detailed understanding of systematic errors than is required for the cross-correlation search. In this work, we demonstrate the coherent approach with realistic data, paving the way for a gravitational-wave background search with unprecedented sensitivity. |
| title | Progress toward the detection of the gravitational-wave background from stellar-mass binary black holes: a mock data challenge |
| topic | General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2506.14179 |