Primordial star formation triggered by UV photons from UHECR

Abstract

The presence of ultra-high energy cosmic rays in the universe in the pre-ionization epoch enhances significantly H${}_2$ kinetics in virialized halos. It results in more efficient radiative cooling and decreases the lower mass limit of the first star-forming systems. Consequently, the fraction of baryons contained in the first luminous objects and their contribution to the reionization of the universe can significantly increase in comparison with the standard scenario.

arXiv comment5 pages, 3 figures, accepted in A&A

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Cited by in corpus (15)

• Formation of the First Stars
• The First Cosmic Structures and their Effects
• Uncertainties in H2 and HD Chemistry and Cooling and their Role in Early Structure Formation
• Impact of dark matter decays and annihilations on reionization
• The impact of dark matter decays and annihilations on the formation of the first structures
• Suppression of HD-cooling in protogalactic gas clouds by Lyman-Werner radiation
• Intergalactic medium heating by dark matter
• Impact of Cosmic Rays on Population III Star Formation
• Cosmic rays and the primordial gas
• Particle decay in the early universe: predictions for 21 cm
• The First Stars: formation under cosmic ray feedback
• Cosmic Reionization and the First Nonlinear Structures in the Universe
• Signatures of particle decay in 21 cm absorptions from first minihalos
• HI absorption from the epoch of reionization and primordial magnetic fields
• Collapse of the Primordial Gas Clouds in the Presence of UV Radiation Field