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Nature 455, 1049-1051 (23 October 2008) | doi:10.1038/4551049a; Published online 22 October 2008
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Astrophysics: How do galaxies form?
Sidney van den Bergh1
Abstract
A study of galaxies indicates that galaxy formation may be regulated by a single parameter. This unexpected finding shows that prevailing views on the process could need revision.
The current theory of galaxy formation holds that galaxies were assembled through the chaotic hierarchical merging of massive haloes of dark matter, in which star-forming matter was later embedded. One would therefore expect the properties of individual galaxies to be determined by numerous independent factors, such as star-forming history, merger history, mass, angular momentum, size and environment.
- Sidney van den Bergh is at the Dominion Astrophysical Observatory, Herzberg Institute of Astrophysics, National Research Council of Canada, Victoria, British Columbia V9E 2E7, Canada.
Email: sidney.vandenbergh@nrc-cnrc.gc.ca
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