Gas and galaxy formation

Details Gas and galaxy formation Gas and galaxy formation

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pasa...16....3n&link_type=abstract

Publications Astronomical Society of Australia, vol. 16, no. 1, p. 3-7

Astronomy and Astrophysics

Astronomy

Galaxy Formation

Scientific paper

The theory of galaxy formation is reviewed briefly. From the evidence of clusters today, the primordial gas fraction was 20 percent or more. Thus, while the Universe is dominated by dark matter, gas plays an appreciable role in galaxy formation. Collapses of dwarf protogalaxies produce predominantly cold gas. It is argued that, in such cold collapses, the collapsed gas is largely self-gravitating. As a result, gas processes play a critical role in determining the visible structure of galaxies.

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