Hunting Hidden Axion Signals in Pulsar Dispersion Measurements with Machine Learning
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866908615963574272 |
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| author | Shi, Haihao Huang, Zhenyang Yan, Qiyu Li, Jun Lü, Guoliang Chen, Xuefei |
| author_facet | Shi, Haihao Huang, Zhenyang Yan, Qiyu Li, Jun Lü, Guoliang Chen, Xuefei |
| contents | In axion models, interactions between axions and electromagnetic waves induce frequency-dependent time delays determined by the axion mass and decay constant. These small delays are difficult to detect, limiting the effectiveness of traditional methods. We compute such delays under realistic radio telescope conditions and identify a prominent dispersive feature near half the axion mass, which appears non-divergent within the limits of observational resolution. Based on this, we develop a machine learning method that achieves 90\% classification accuracy and demonstrates well performance in low signal-to-noise regimes. The method's robustness is confirmed against false positives using both simulated noisy data and real-world, known-null observations. Future improvements in optical clock precision and telescope bandwidth, particularly with instruments such as the Qitai Radio Telescope, may enhance constraints on the axion decay constant by up to four orders of magnitude in the $10^{-6} \sim 10^{-4}$ eV mass range. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_16562 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Hunting Hidden Axion Signals in Pulsar Dispersion Measurements with Machine Learning Shi, Haihao Huang, Zhenyang Yan, Qiyu Li, Jun Lü, Guoliang Chen, Xuefei High Energy Astrophysical Phenomena In axion models, interactions between axions and electromagnetic waves induce frequency-dependent time delays determined by the axion mass and decay constant. These small delays are difficult to detect, limiting the effectiveness of traditional methods. We compute such delays under realistic radio telescope conditions and identify a prominent dispersive feature near half the axion mass, which appears non-divergent within the limits of observational resolution. Based on this, we develop a machine learning method that achieves 90\% classification accuracy and demonstrates well performance in low signal-to-noise regimes. The method's robustness is confirmed against false positives using both simulated noisy data and real-world, known-null observations. Future improvements in optical clock precision and telescope bandwidth, particularly with instruments such as the Qitai Radio Telescope, may enhance constraints on the axion decay constant by up to four orders of magnitude in the $10^{-6} \sim 10^{-4}$ eV mass range. |
| title | Hunting Hidden Axion Signals in Pulsar Dispersion Measurements with Machine Learning |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2505.16562 |