Molecular Clouds at the Reionization Epoch

Details Molecular Clouds at the Reionization Epoch Molecular Clouds at the Reionization Epoch

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..280e..49s&link_type=abstract

The Molecular Universe, Proceedings of the 280th Symposium of the International Astronomical Union held in Toledo, Spain, May 30

Astronomy and Astrophysics

Astronomy

Scientific paper

Observations of old Population-II stars show that they formed in clouds with very low (but non-vanishing)
abundances of heavy elements (C, N, O, Fe, etc.) produced at the "reionization epoch". I will present a theoretical discussion of the expected chemical properties of the early star-forming molecular clouds. Hydrides, in particular OH radicals, would have been the dominant heavy element bearing molecule, as opposed to the CO-dominated systems that formed at later epochs (such as the Milky Way molecular clouds.)

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