IAU02758
Presentation type requested: POSTER
REVISED PRIMORDIAL CHEMISTRY IN THE LUMPY EXPANDING UNIVERSE
Denis Puy
Geneva Observatory
The leading view in structure formation theories is that the first condensed structures occurred at small scales. Because of their rotational and vibrational levels, molecules such as H2, HD or LiH are important thermal agent determining the heating or cooling of the first structures. The knowledge of the molecular abundances given by solving the chemical kinetic equations in the post nucleo-synthesis matter is a crucial step in order to determine the growth of the first condensed structures. In this work, we present calculations about primordial molecules formation revised with respect to previous works in several ways. In addition these equations are solved in over or underdense matter fluctuations in the linear approximation. We can thus quantifiy the differential chemical abundances following variations in the assumed initial conditions or in density fluctuations.
Pfenniger Daniel
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