Lithium hydride in the early universe and in protogalactic clouds

Details Lithium hydride in the early universe and in protogalactic clouds Lithium hydride in the early universe and in protogalactic clouds

1997-04-30

arxiv.org/abs/astro-ph/9704287v1

Astronomy and Astrophysics

Astrophysics

10 pages (LaTeX), 7 Figures to be published in Monthly Notices of the Royal Astronomical Society

Scientific paper

We examine the processes of formation and destruction of LiH molecules in the primordial gas at temperatures T \leq 5000 K in the framework of standard Friedmann cosmological models and we compute the optical depth of the Universe due to Thomson scattering of cosmic background photons on LiH. With the help of a simple model of evolution of a spherical density perturbation we follow the linear growth and the subsequent collapse of protogalactic clouds of various masses, evaluating consistently their physical characteristics and chemical composition. We determine the expected level of anisotropy of the cosmic background radiation due to the presence of LiH molecules in high-redshift protogalactic clouds. We conclude that LiH spectral features generated in the primordial gas are hardly detectable with current techniques and instrumentation.

Affiliated with

Also associated with

No associations

Rating

Lithium hydride in the early universe and in protogalactic clouds does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Lithium hydride in the early universe and in protogalactic clouds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lithium hydride in the early universe and in protogalactic clouds will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-300631