Disentangling photon rings beyond General Relativity with future radio-telescope arrays
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| Acceso en línea: | |
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| _version_ | 1866909166333853696 |
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| author | Carballo-Rubio, Raúl Delaporte, Héloïse Eichhorn, Astrid Held, Aaron |
| author_facet | Carballo-Rubio, Raúl Delaporte, Héloïse Eichhorn, Astrid Held, Aaron |
| contents | New physics beyond General Relativity can modify image features of black holes and horizonless spacetimes and increase the separation between photon rings. This motivates us to explore synthetic images consisting of two thin rings. Our synthetic images are parameterized by the separation as well as the relative flux density of the two rings. We perform fits to the visibility amplitude and analyze closure quantities. The current Event Horizon Telescope array cannot detect the presence of a second ring in the region of parameters motivated by particular new-physics cases. We show that this can be improved in three ways: first, if the array is upgraded with Earth-based telescopes with sufficiently high sensitivity, second, if the array is upgraded with a space-based station and third, if super-resolution techniques are used for the data obtained by the array. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_11351 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Disentangling photon rings beyond General Relativity with future radio-telescope arrays Carballo-Rubio, Raúl Delaporte, Héloïse Eichhorn, Astrid Held, Aaron General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena New physics beyond General Relativity can modify image features of black holes and horizonless spacetimes and increase the separation between photon rings. This motivates us to explore synthetic images consisting of two thin rings. Our synthetic images are parameterized by the separation as well as the relative flux density of the two rings. We perform fits to the visibility amplitude and analyze closure quantities. The current Event Horizon Telescope array cannot detect the presence of a second ring in the region of parameters motivated by particular new-physics cases. We show that this can be improved in three ways: first, if the array is upgraded with Earth-based telescopes with sufficiently high sensitivity, second, if the array is upgraded with a space-based station and third, if super-resolution techniques are used for the data obtained by the array. |
| title | Disentangling photon rings beyond General Relativity with future radio-telescope arrays |
| topic | General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2312.11351 |