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| Paper: |
Galaxy Down-Sizing: A Tough Challenge for the Hierarchical Universe? |
| Volume: |
399, Panoramic Views of Galaxy Formation and Evolution |
| Page: |
139 |
| Authors: |
Bower, R.G. |
| Abstract: |
Observartional astronomers, claim that the visible universe is defined by galaxy ”down-sizing”, and that the formation of galaxies is ”anti-hierarchical”. At first sight, this seems to contradict the ”heirarchical” formation of structure that is a key component of the ΛCDM paradigm. In this talk I will briefly review what these terms mean and why there has historically been such conflict between observational and theoretical views of the universe. I will discuss how this paradox has evaporated in recent galaxy formation models, largely due to the regulation of galaxy formation by ”radio-mode” accretion onto black-holes. |
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