martes, 12 de julio de 2011

Dwarf Galaxies Point to a Fundamental Flaw in Our Understanding of How Galaxies Form and Evolve & 4 new Items:



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"if big galaxies are supposed to be formed from numerous mergers of smaller systems, how come the properties of the small galaxies we see today don't match the larger galaxies? You may start to wonder if there isn't a fundamental flaw in some aspect of our current understanding of how galaxies form and evolve, and exactly how important mergers are in the history of galaxies."
Eline Tolstoy, astrophysicist at the University of Groningen in the Netherlands.

The smallest dwarf galaxies are the most straight forward objects in which to study star formation processes on a galactic scale. They are typically single cell star forming entities, and as small potentials in orbit around a much larger one they are unlikely to accrete extraneous matter during their lifetime (either intergalactic gas, or galaxies) because they will typically lose the competition with the much larger galaxy.




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Dwarf Galaxies Point to a Fundamental Flaw in Our Understanding of How Galaxies Form and Evolve

"if big galaxies are supposed to be formed from numerous mergers of smaller systems, how come the properties of the small galaxies we see today don't match the larger galaxies? You may start to wonder if there isn't a fundamental...


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