Partial Lyα thermalization in an analytic nonlinear diffusion model

• Verfasst von: Wolschin, Georg [VerfasserIn]
• Titel: Partial Lyα thermalization in an analytic nonlinear diffusion model
• Verf.angabe: Georg Wolschin
• E-Jahr: 2024
• Jahr: 28 February 2024
• Umfang: 10 S.
• Illustrationen: Illustrationen
• Fussnoten: Gesehen am 09.08.2024
• Titel Quelle: Enthalten in: Scientific reports
• Ort Quelle: [London] : Springer Nature, 2011
• Jahr Quelle: 2024
• Band/Heft Quelle: 14(2024), Artikel-ID 4935, Seite 1-10
• ISSN Quelle: 2045-2322
• DOI: doi:10.1038/s41598-024-54833-z
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Applied mathematics
• Sach-SW: Cosmology
• Sach-SW: Nonlinear phenomena
• K10plus-PPN: 1898314896

Abstract

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 Ly$$\alpha$$energy content in an analytically solvable nonlinear diffusion model. The amplitude of the partially thermalized and redshifted Ly$$\alpha$$line is found to be too low to be visible in the cosmic microwave spectrum, in accordance with previous numerical models and Planck observations.