Image of Alice in Wonderland at the Mad Hatter's tea party You are cordially invited to afternoon tea and biscuits wine and chocolate

Astronomy Tea Talks at Caltech

Mondays, Hameetman auditorium (Cahill)
Tea:  4.00pm
Talk: 4.15pm

Organized by:

2010 - 2011 season:
6 June 2011 Rik Williams (OCIW)

'Transformations in elliptical galaxies from z=2 to the present'

Although the standard picture of hierarchical galaxy formation suggests that massive galaxies in the local universe are the end result of numerous mergers between smaller antecedents, it is now apparent that massive galaxies with quenched star formation were relatively common even above z=2. These "early early-type" galaxies exhibit properties strikingly different from those of local ellipticals, with very small radii and high velocity dispersions for their masses, and the transformative processes connecting these compact z=2 galaxies to local ellipticals are currently unknown. I will review the evidence for these galaxies' peculiar properties and show how clues to their evolution can be derived from deep, wide-area infrared-selected photometric surveys.
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Last modified on 20th Jul 2011 by Dominik A. Riechers.  

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