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SUMMARY:Supermassive Black Hole Growth and Galaxy Evolution - Meg Urry (Ya
 le University)
DTSTART:20160315T160000Z
DTEND:20160315T170000Z
UID:TALK63482@talks.cam.ac.uk
CONTACT:Simon Hodgkin
DESCRIPTION:Using multi-wavelength surveys like GOODS\, COSMOS\, and Strip
 e 82X\, we measure the growth of supermassive black holes at the centers o
 f galaxies over  the last approx 12 billion years. Most actively growing b
 lack holes are heavily obscured and thus are not seen in large optical sur
 veys\, like the Sloan Digital Sky Survey\; at the same time\, the deep mul
 ti-wavelength\nsurveys are too small to find rare objects like luminous SD
 SS quasars. So completing the census of black hole growth will require a l
 arge-volume\nX-ray survey\, to explore obscured growth at high luminosity 
 and/or high redshift. Theorists have suggested that mergers trigger Active
  Galactic\nNuclei (AGN)\, whose radiation and/or outflows may quench star 
 formation and strongly affect galaxy evolution (³feedback²). But our mor
 phological\nanalyses showed that most moderate luminosity AGN at redshifts
  z ~1-2 have not undergone a recent major merger. Finally\, using morpholo
 gical\nclassifications in the local universe from Galaxy Zoo\, we identify
  two distinct modes of galaxy evolution in the local universe\, with merge
 rs and\nAGN feedback affecting only a minority.\n
LOCATION:Sackler Lecture Theatre\, IoA (tea at 3:30 pm)
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