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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
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2024
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2412.09806 |
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| _version_ | 1866929686105292800 |
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| author | Chang, Chen-Ming Wei, Jun-Jie Meng, Ke-Lai Zhang, Song-Bo Gao, Hao-Xuan Geng, Jin-Jun Wu, Xue-Feng |
| author_facet | Chang, Chen-Ming Wei, Jun-Jie Meng, Ke-Lai Zhang, Song-Bo Gao, Hao-Xuan Geng, Jin-Jun Wu, Xue-Feng |
| contents | The gravitational time delays of macro-lenses can be used to constrain the rest mass of the photon with high accuracy. Assuming a point-mass $+$ external shear lens model, we prove that an upper limit of the photon mass can be derived directly from two observables--the time delay $Δt$ and the leading-to-trailing flux ratio $R$ of strongly lensed fast radio bursts (FRBs). Using the observed values of $Δt$ and $R$ of a lensed FRB candidate, i.e., FRB 20190308C, as a reference, we obtain a strict upper limit of the photon mass between $m_γ< 5.3 \times {10}^{-42}\,\rm kg$, for a given external shear strength of $γ' = 0.01$, and $m_γ < 2.1 \times 10^{-41}-2.4 \times 10^{-42}\,\text{kg}$, within the external shear range of $0<γ'<1$. This provides the most stringent limit to date on the photon mass through gravitational lensing time delays, improving by 1 to 2 orders of magnitude the previous results obtained from lensed active galactic nuclei. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_09806 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Bounding the photon mass with gravitationally lensed fast radio bursts Chang, Chen-Ming Wei, Jun-Jie Meng, Ke-Lai Zhang, Song-Bo Gao, Hao-Xuan Geng, Jin-Jun Wu, Xue-Feng High Energy Astrophysical Phenomena The gravitational time delays of macro-lenses can be used to constrain the rest mass of the photon with high accuracy. Assuming a point-mass $+$ external shear lens model, we prove that an upper limit of the photon mass can be derived directly from two observables--the time delay $Δt$ and the leading-to-trailing flux ratio $R$ of strongly lensed fast radio bursts (FRBs). Using the observed values of $Δt$ and $R$ of a lensed FRB candidate, i.e., FRB 20190308C, as a reference, we obtain a strict upper limit of the photon mass between $m_γ< 5.3 \times {10}^{-42}\,\rm kg$, for a given external shear strength of $γ' = 0.01$, and $m_γ < 2.1 \times 10^{-41}-2.4 \times 10^{-42}\,\text{kg}$, within the external shear range of $0<γ'<1$. This provides the most stringent limit to date on the photon mass through gravitational lensing time delays, improving by 1 to 2 orders of magnitude the previous results obtained from lensed active galactic nuclei. |
| title | Bounding the photon mass with gravitationally lensed fast radio bursts |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2412.09806 |