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SUMMARY:Obesity in the Universe:  Why Did Early-Type Galaxies Grow in Size
  - Richard Ellis (CALTECH)
DTSTART:20120726T150000Z
DTEND:20120726T160000Z
UID:TALK38948@talks.cam.ac.uk
CONTACT:Paula younger
DESCRIPTION:Once considered the simplest class of galaxy to model and expl
 ain\, the assembly\nhistory of early type galaxies still presents many puz
 zles. Spectroscopic observations show that\nthe most massive examples comp
 leted their star formation earlier than that in their \nless massive count
 erparts\, in apparent contradiction to popularly-held hierarchical \nmodel
 s. Hubble observations have also revealed that many of the most massive\ne
 arly types seen at high redshift are much more compact than their present-
 day\nequivalents. This suggests they somehow expanded in size without grow
 ing\nsignificantly in mass. Clearly\, early type galaxies still have a lot
  to tell us about\ngalaxy formation and assembly. I will reveal the progre
 ss being made with new\nspectroscopic and Hubble data (....but don't promi
 se to solve all the puzzles).
LOCATION:Martin Ryle Seminar Room\, Kavli Institute
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