Gravitational Faraday Effect induced by Dark Matter Spin
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866914955786190848 |
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| author | Barriga, F. Izaurieta, F. Lepe, S. Mesa, P. Muñoz, J. Quinzacara, C. Valdivia, O. |
| author_facet | Barriga, F. Izaurieta, F. Lepe, S. Mesa, P. Muñoz, J. Quinzacara, C. Valdivia, O. |
| contents | We show that the spin of dark matter induces a gravitational analog of the electromagnetic Faraday effect, where the polarization of gravitational waves undergoes a rotation as they propagate through a dark matter halo with a non-vanishing axial spin tensor (hypermomentum). An expression for the gravitational rotation angle is provided, which is analogous to the Faraday rotation in optics, and evaluate its significance in astrophysical settings. Although the effect is expected to be small under current observational constraints, we discuss its potential importance in the early universe. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2409_15509 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Gravitational Faraday Effect induced by Dark Matter Spin Barriga, F. Izaurieta, F. Lepe, S. Mesa, P. Muñoz, J. Quinzacara, C. Valdivia, O. General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics High Energy Physics - Theory We show that the spin of dark matter induces a gravitational analog of the electromagnetic Faraday effect, where the polarization of gravitational waves undergoes a rotation as they propagate through a dark matter halo with a non-vanishing axial spin tensor (hypermomentum). An expression for the gravitational rotation angle is provided, which is analogous to the Faraday rotation in optics, and evaluate its significance in astrophysical settings. Although the effect is expected to be small under current observational constraints, we discuss its potential importance in the early universe. |
| title | Gravitational Faraday Effect induced by Dark Matter Spin |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics High Energy Physics - Theory |
| url | https://arxiv.org/abs/2409.15509 |