Primordial star formation triggered by UV photons from UHECR
Department of Physics, University of Rostov, and Isaac Newton Institute of Chile, Rostov-on-Don Branch, Rostov-on-Don 344090, Russia e-mail: firstname.lastname@example.org
Corresponding author: Yu. A. Shchekinov, email@example.com
Accepted: 13 February 2004
The presence of ultra-high energy cosmic rays in the universe in the pre-ionization epoch enhances significantly H2 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.
Key words: cosmology: early universe / cosmology: miscellaneous / stars: formation
© ESO, 2004