Primordial molecular clouds

Details Primordial molecular clouds Primordial molecular clouds

1999-02-03

arxiv.org/abs/astro-ph/9902051v1

AIP Conf.Proc.476:105,1999

Astronomy and Astrophysics

Astrophysics

12 pages, 1 figures, Invited Talk at 3K Cosmology Conference-Roma October 98

Scientific paper

10.1063/1.59317

It is now well known that a primordial chemistry, involving light elements produced during the nucleosynthesis period, might develop during the hydrogen post-recombination era. In particular, molecular ions and primordial molecules such as H2, HD and LiH will be produced. We summarize this primordial chemistry after the recombination epoch, and then present a simple gravitational collapse model of a cloud. The potentiality of fragmentation of this collapsing protoclouds through the thermal instability is also discussed. We suggest that this study could also be extended to the CO molecule, because the carbon reservoir molecule CO has already been observed in high redshifts objects.

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