Effect of noise characterization on the detection of mHz stochastic gravitational waves
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866908827265269760 |
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| author | Karnesis, Nikolaos Baghi, Quentin Bayle, Jean-Baptiste Galanis, Nikiforos |
| author_facet | Karnesis, Nikolaos Baghi, Quentin Bayle, Jean-Baptiste Galanis, Nikiforos |
| contents | Pulsar timing arrays' hint for a stochastic gravitational-wave background (SGWB) leverages the expectations of a future detection in the millihertz band, particularly with the LISA space mission. However, finding an SGWB with a single orbiting detector is challenging: It calls for cautious modelling of instrumental noise, which is also mainly stochastic. It was shown that agnostic noise reconstruction methods provide robustness in the detection process. We build on previous work to include more realistic instrumental simulations and additional degrees of freedom in the noise inference model and analyze the impact of LISA's sensitivity to SGWBs. Particularly, we model the two main types of noise sources with separate transfer functions and power spectral density spline fitting. We assess the detectability bounds and their dependence on the flexibility of the noise model and on the prior probability, allowing us to refine previously reported results. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_19741 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Effect of noise characterization on the detection of mHz stochastic gravitational waves Karnesis, Nikolaos Baghi, Quentin Bayle, Jean-Baptiste Galanis, Nikiforos General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics Pulsar timing arrays' hint for a stochastic gravitational-wave background (SGWB) leverages the expectations of a future detection in the millihertz band, particularly with the LISA space mission. However, finding an SGWB with a single orbiting detector is challenging: It calls for cautious modelling of instrumental noise, which is also mainly stochastic. It was shown that agnostic noise reconstruction methods provide robustness in the detection process. We build on previous work to include more realistic instrumental simulations and additional degrees of freedom in the noise inference model and analyze the impact of LISA's sensitivity to SGWBs. Particularly, we model the two main types of noise sources with separate transfer functions and power spectral density spline fitting. We assess the detectability bounds and their dependence on the flexibility of the noise model and on the prior probability, allowing us to refine previously reported results. |
| title | Effect of noise characterization on the detection of mHz stochastic gravitational waves |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2601.19741 |