Robust $μ$-distortion constraints on primordial supermassive black holes from non-Gaussian perturbations
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arXiv
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866929521242931200 |
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| author | Byrnes, Christian T. Lesgourgues, Julien Sharma, Devanshu |
| author_facet | Byrnes, Christian T. Lesgourgues, Julien Sharma, Devanshu |
| contents | Explaining the origin of supermassive black holes via a primordial origin is severely challenged by the tight spectral distortion constraints on the amplitude of the primordial perturbations. Following the first calculation of how the $μ$ constraints are modified by non-Gaussianity in a companion paper, we here make the first robust constraints on primordial black hole formation under large non-Gaussianity. Even the infinite $f_{\rm NL}$ limit is insufficiently non-Gaussian but much higher-order non-Gaussianity of the form ${\cal R}={\cal R}_{\rm G}^5$ may allow the formation of any mass primordial black hole without conflicting with distortion constraints. We caution that such extreme models face other challenges. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_18475 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Robust $μ$-distortion constraints on primordial supermassive black holes from non-Gaussian perturbations Byrnes, Christian T. Lesgourgues, Julien Sharma, Devanshu Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology Explaining the origin of supermassive black holes via a primordial origin is severely challenged by the tight spectral distortion constraints on the amplitude of the primordial perturbations. Following the first calculation of how the $μ$ constraints are modified by non-Gaussianity in a companion paper, we here make the first robust constraints on primordial black hole formation under large non-Gaussianity. Even the infinite $f_{\rm NL}$ limit is insufficiently non-Gaussian but much higher-order non-Gaussianity of the form ${\cal R}={\cal R}_{\rm G}^5$ may allow the formation of any mass primordial black hole without conflicting with distortion constraints. We caution that such extreme models face other challenges. |
| title | Robust $μ$-distortion constraints on primordial supermassive black holes from non-Gaussian perturbations |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2404.18475 |