General relativistic effects on photon spectrum emitted from dark matter halos around primordial black holes
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912306404786176 |
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| author | Suzuki, Toya Igata, Takahisa Kohri, Kazunori Harada, Tomohiro |
| author_facet | Suzuki, Toya Igata, Takahisa Kohri, Kazunori Harada, Tomohiro |
| contents | We investigate general relativistic effects on the photon spectrum emitted from decaying (or annihilating) particle dark matter in the halo surrounding a primordial black hole. The spectrum undergoes significant modification due to gravitational redshifts, which induces broadening as a result of the intense gravitational field near the black hole. This characteristic alteration in the photon spectrum presents a unique observational signature. Future observations of such spectral features may provide critical evidence for a mixed dark matter scenario, involving both primordial black holes and particle dark matter. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_00449 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | General relativistic effects on photon spectrum emitted from dark matter halos around primordial black holes Suzuki, Toya Igata, Takahisa Kohri, Kazunori Harada, Tomohiro High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology High Energy Physics - Theory We investigate general relativistic effects on the photon spectrum emitted from decaying (or annihilating) particle dark matter in the halo surrounding a primordial black hole. The spectrum undergoes significant modification due to gravitational redshifts, which induces broadening as a result of the intense gravitational field near the black hole. This characteristic alteration in the photon spectrum presents a unique observational signature. Future observations of such spectral features may provide critical evidence for a mixed dark matter scenario, involving both primordial black holes and particle dark matter. |
| title | General relativistic effects on photon spectrum emitted from dark matter halos around primordial black holes |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2504.00449 |