Observational Signatures of Highly Magnified Gravitational Waves from Compact Binary Coalescence
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| Format: | Preprint |
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2024
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| _version_ | 1866908319317229568 |
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| author | Lo, Rico K. L. Vujeva, Luka Ezquiaga, Jose María Chan, Juno C. L. |
| author_facet | Lo, Rico K. L. Vujeva, Luka Ezquiaga, Jose María Chan, Juno C. L. |
| contents | Gravitational lensing has empowered telescopes to discover astronomical objects that are otherwise out of reach without being highly magnified by foreground structures. While we expect gravitational waves (GWs) from compact binary coalescences to also experience lensing, the phenomenology of highly magnified GWs has not been fully exploited. In this Letter, we fill this gap and explore the observational signatures of these highly magnified GWs. We find that these signatures are robust against modeling details and can be used as smoking-gun evidence to confirm the detection of lensing of GWs without any electromagnetic observation. Additionally, diffraction becomes important in some cases, which limits the maximum possible magnification and gives waveform signatures of lensing that can only be observed by GW detectors. Even with current-generation observatories, we are already sensitive to these rare, highly magnified GWs and could use them to probe the high-redshift Universe beyond the usual horizon. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_17547 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Observational Signatures of Highly Magnified Gravitational Waves from Compact Binary Coalescence Lo, Rico K. L. Vujeva, Luka Ezquiaga, Jose María Chan, Juno C. L. General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics Gravitational lensing has empowered telescopes to discover astronomical objects that are otherwise out of reach without being highly magnified by foreground structures. While we expect gravitational waves (GWs) from compact binary coalescences to also experience lensing, the phenomenology of highly magnified GWs has not been fully exploited. In this Letter, we fill this gap and explore the observational signatures of these highly magnified GWs. We find that these signatures are robust against modeling details and can be used as smoking-gun evidence to confirm the detection of lensing of GWs without any electromagnetic observation. Additionally, diffraction becomes important in some cases, which limits the maximum possible magnification and gives waveform signatures of lensing that can only be observed by GW detectors. Even with current-generation observatories, we are already sensitive to these rare, highly magnified GWs and could use them to probe the high-redshift Universe beyond the usual horizon. |
| title | Observational Signatures of Highly Magnified Gravitational Waves from Compact Binary Coalescence |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2407.17547 |