Universal profile for cosmic birefringence tomography with radio galaxies
Fuente:
arXiv
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| Autor principal: | |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866913785848004608 |
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| author | Naokawa, Fumihiro |
| author_facet | Naokawa, Fumihiro |
| contents | We propose a new method to tomographically probe cosmic birefringence using radio galaxies. We show that the redshift evolution of the cosmic birefringence angle induced by a slow-rolling pseudoscalar field, which is a candidate for dynamical dark energy, is independent of the detailed model of the pseudoscalor field. This universal profile evolves predominantly at $z\lesssim10$. In contrast, if the origin is a dark matter-like pseudscalor field, the resulting birefringence angle tends to be negligible in the low-redshift regime. This new insight provides a strong motivation to independently test the cosmic birefringence using polarized astrophysical sources such as radio galaxies. We find that a sample size of $\order{10^5-10^6}$ is required to distinguish the profiles, which is achievable with ongoing and upcoming radio surveys such as ASKAP or SKA. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_06709 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Universal profile for cosmic birefringence tomography with radio galaxies Naokawa, Fumihiro Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology High Energy Physics - Phenomenology We propose a new method to tomographically probe cosmic birefringence using radio galaxies. We show that the redshift evolution of the cosmic birefringence angle induced by a slow-rolling pseudoscalar field, which is a candidate for dynamical dark energy, is independent of the detailed model of the pseudoscalor field. This universal profile evolves predominantly at $z\lesssim10$. In contrast, if the origin is a dark matter-like pseudscalor field, the resulting birefringence angle tends to be negligible in the low-redshift regime. This new insight provides a strong motivation to independently test the cosmic birefringence using polarized astrophysical sources such as radio galaxies. We find that a sample size of $\order{10^5-10^6}$ is required to distinguish the profiles, which is achievable with ongoing and upcoming radio surveys such as ASKAP or SKA. |
| title | Universal profile for cosmic birefringence tomography with radio galaxies |
| topic | Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2504.06709 |