Partial Ly$α$ thermalization in an analytic nonlinear diffusion model
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arXiv
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866916181587263488 |
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| author | Wolschin, Georg |
| author_facet | Wolschin, Georg |
| contents | During recombination, the cosmic background radiation is disturbed, in particular, by Lyman-alpha emissions from neutral hydrogen. It is proposed to account for the subsequent time-dependent partial thermalization of the Lyman-alpha energy content in an analytically solvable nonlinear diffusion model. The amplitude of the partially thermalized and redshifted Ly-$α$ line is found to be too low to be visible in the cosmic microwave spectrum, in accordance with previous numerical models and Planck observations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_11320 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Partial Ly$α$ thermalization in an analytic nonlinear diffusion model Wolschin, Georg Cosmology and Nongalactic Astrophysics During recombination, the cosmic background radiation is disturbed, in particular, by Lyman-alpha emissions from neutral hydrogen. It is proposed to account for the subsequent time-dependent partial thermalization of the Lyman-alpha energy content in an analytically solvable nonlinear diffusion model. The amplitude of the partially thermalized and redshifted Ly-$α$ line is found to be too low to be visible in the cosmic microwave spectrum, in accordance with previous numerical models and Planck observations. |
| title | Partial Ly$α$ thermalization in an analytic nonlinear diffusion model |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2402.11320 |