Cosmology-independent Photon Mass Limits from Localized Fast Radio Bursts by using Artificial Neural Networks
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arXiv
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866914771671973888 |
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| author | Ran, Jing-Yu Wang, Bao Wei, Jun-Jie |
| author_facet | Ran, Jing-Yu Wang, Bao Wei, Jun-Jie |
| contents | A hypothetical photon mass, $m_γ$, can produce a frequency-dependent vacuum dispersion of light, which leads to an additional time delay between photons with different frequencies when they propagate through a fixed distance. The dispersion measure--redshift measurements of fast radio bursts (FRBs) have been widely used to constrain the rest mass of the photon. However, all current studies analyzed the effect of the frequency-dependent dispersion for massive photons in the standard $Λ$CDM cosmological context. In order to alleviate the circularity problem induced by the presumption of a specific cosmological model based on the fundamental postulate of the masslessness of photons, here we employ a new model-independent smoothing technique, Artificial Neural Network (ANN), to reconstruct the Hubble parameter $H(z)$ function from 34 cosmic-chronometer measurements. By combining observations of 32 well-localized FRBs and the $H(z)$ function reconstructed by ANN, we obtain an upper limit of $m_γ \le 3.5 \times 10^{-51}\;\rm{kg}$, or equivalently $m_γ \le 2.0 \times 10^{-15}\;\rm{eV/c^2}$ ($m_γ \le 6.5 \times 10^{-51}\;\rm{kg}$, or equivalently $m_γ \le 3.6 \times 10^{-15}\;\rm{eV/c^2}$) at the $1σ$ ($2σ$) confidence level. This is the first cosmology-independent photon mass limit derived from extragalactic sources. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_17154 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Cosmology-independent Photon Mass Limits from Localized Fast Radio Bursts by using Artificial Neural Networks Ran, Jing-Yu Wang, Bao Wei, Jun-Jie Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology High Energy Physics - Phenomenology A hypothetical photon mass, $m_γ$, can produce a frequency-dependent vacuum dispersion of light, which leads to an additional time delay between photons with different frequencies when they propagate through a fixed distance. The dispersion measure--redshift measurements of fast radio bursts (FRBs) have been widely used to constrain the rest mass of the photon. However, all current studies analyzed the effect of the frequency-dependent dispersion for massive photons in the standard $Λ$CDM cosmological context. In order to alleviate the circularity problem induced by the presumption of a specific cosmological model based on the fundamental postulate of the masslessness of photons, here we employ a new model-independent smoothing technique, Artificial Neural Network (ANN), to reconstruct the Hubble parameter $H(z)$ function from 34 cosmic-chronometer measurements. By combining observations of 32 well-localized FRBs and the $H(z)$ function reconstructed by ANN, we obtain an upper limit of $m_γ \le 3.5 \times 10^{-51}\;\rm{kg}$, or equivalently $m_γ \le 2.0 \times 10^{-15}\;\rm{eV/c^2}$ ($m_γ \le 6.5 \times 10^{-51}\;\rm{kg}$, or equivalently $m_γ \le 3.6 \times 10^{-15}\;\rm{eV/c^2}$) at the $1σ$ ($2σ$) confidence level. This is the first cosmology-independent photon mass limit derived from extragalactic sources. |
| title | Cosmology-independent Photon Mass Limits from Localized Fast Radio Bursts by using Artificial Neural Networks |
| topic | Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2404.17154 |