Galactic magnetic fields seeded by ultralight dark photons
Fuente:
arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
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| _version_ | 1866914317414170624 |
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| author | Berger, Joshua Bhoonah, Amit Bramante, Joseph Kim, J. Leo Song, Ningqiang Widrow, Lawrence M. |
| author_facet | Berger, Joshua Bhoonah, Amit Bramante, Joseph Kim, J. Leo Song, Ningqiang Widrow, Lawrence M. |
| contents | In this work, we show that ultralight dark photons, which couple to the Standard Model photon through kinetic mixing, can potentially source galactic scale magnetic fields. Although these magnetic fields would be too weak to detect at present in galaxies due to plasma screening effects, we show that dark photons can provide the seed magnetic field strength ($10^{-20}$ G) required for dynamo amplification in galaxies. Such dynamo-amplified magnetic fields are consistent with observations of $μ$G strength galactic magnetic fields. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_07508 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Galactic magnetic fields seeded by ultralight dark photons Berger, Joshua Bhoonah, Amit Bramante, Joseph Kim, J. Leo Song, Ningqiang Widrow, Lawrence M. High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies In this work, we show that ultralight dark photons, which couple to the Standard Model photon through kinetic mixing, can potentially source galactic scale magnetic fields. Although these magnetic fields would be too weak to detect at present in galaxies due to plasma screening effects, we show that dark photons can provide the seed magnetic field strength ($10^{-20}$ G) required for dynamo amplification in galaxies. Such dynamo-amplified magnetic fields are consistent with observations of $μ$G strength galactic magnetic fields. |
| title | Galactic magnetic fields seeded by ultralight dark photons |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2511.07508 |