| 7 | | During the epoch of first star and protogalaxy formation the formation of these structures was mediated through H,,2,, which is an important coolant in primordial clouds. The dominant formation mechanism of H,,2,, during this epoch is the associative detachment (AD) reaction H^^-^^ + H → H2 + e^^-^^. Published values for this process differ by nearly an order of magnitude. This introduces uncertainties into cosmological models of structure formation and limits our understanding of protogalaxy formation during this epoch and of the characteristic masses and cooling times for the first stars. |
| | 7 | During the epoch of first star and protogalaxy formation the formation of these structures was mediated through H,,2,, which is an important coolant in primordial clouds. The dominant formation mechanism of H,,2,, during this epoch is the associative detachment (AD) reaction H^^-^^ + H → H,,2,, + e^^-^^. Published values for this process differ by nearly an order of magnitude. This introduces uncertainties into cosmological models of structure formation and limits our understanding of protogalaxy formation during this epoch and of the characteristic masses and cooling times for the first stars. |
