Absorption Measurement of Hydrogen Molecules in the Early Universe

Details Absorption Measurement of Hydrogen Molecules in the Early Universe Absorption Measurement of Hydrogen Molecules in the Early Universe

2001-06-06

arxiv.org/abs/astro-ph/0106102v1

Astronomy and Astrophysics

Astrophysics

5 pages, to be published in PASJ, August 25, 2001

Scientific paper

We investigate the observability of hydrogen molecules in absorption. The absorption efficiency of the hydrogen molecules become comparable with or larger than that of the dust grains in the metal-poor condition expected in the early Universe. If we can use bright infrared continuum sources behind the molecular gas clouds, the absorption measurement of the hydrogen molecules will be an important technique to explore the primordial gas clouds that are contracting into first-generation objects.

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