Sunday, 15 March 2009

160309: Evidence for hierarchical, inside-out growth

The Problem: massive but really compact, high z, quiescent galaxies have been observed - but where are their descendants?
What they do: compare the densities of a sample of these high z galaxies to nearby elliptical galaxies;
compare growth evolution from three models  
Answer:  they may be the dense cores of nearby galaxies suggesting inside-out growth

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