Chemistry and cooling in metal-free and metal-poor gas

Details Chemistry and cooling in metal-free and metal-poor gas Chemistry and cooling in metal-free and metal-poor gas

2007-08-22

arxiv.org/abs/0708.3086v2

AIPConf.Proc.990:25-29,2008

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures. To appear in "First Stars III", eds. B. O'Shea, A. Heger & T. Abel. This revised version fixes a minor err

Scientific paper

10.1063/1.2905558

I summarize four of the most important areas of uncertainty in the study of the chemistry and cooling of gas with zero or very low metallicity. These are: i) the importance and effects of HD cooling in primordial gas; ii) the importance of metal-line and dust cooling in low metallicity gas; iii) the impact of the large uncertainties that exist in the rate coefficients of several key reactions involved in the formation of H2; and iv) the effectiveness of grain surface chemistry at high redshifts.

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