Dust and Hydrogen Molecules in Metal-Poor Galaxies

Details Dust and Hydrogen Molecules in Metal-Poor Galaxies Dust and Hydrogen Molecules in Metal-Poor Galaxies

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003rmxac..17...97h&link_type=abstract

Galaxy Evolution: Theory & Observations (Eds. Vladimir Avila-Reese, Claudio Firmani, Carlos S. Frenk & Christine Allen) Revista

Astronomy and Astrophysics

Astronomy

Dust, Extinction, Galaxies: Evolution, Infrared: Galaxies, Molecular Processes

Scientific paper

In order to understand the chemical and thermodynamical state of the interstellar medium (ISM) in the early stage of galaxy evolution, dust formation needs to be considered. Even in metal poor galaxies, dust grains can drastically accelerate the formation rate of molecular hydrogen (H[2]). Hydrogen molecules emit vibrational-rotational lines, thus cooling the gas. Consequently, the abundance of the molecules affects the spectrum and the cooling rate of a galaxy.

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