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SUMMARY:The Universe's most extreme star-forming galaxies - Caitlin Casey\
 , University of California\, Irvine
DTSTART:20150721T150000Z
DTEND:20150721T153000Z
UID:TALK60096@talks.cam.ac.uk
CONTACT:Paula younger
DESCRIPTION:Dusty star-forming galaxies (DSFGs) host the most intense stel
 lar nurseries in the Universe.  Their unusual characteristics (SFRs=200-20
 00Msun/yr) pose a unique challenge for cosmological simulations and galaxy
  formation theory\, particularly at early times.  Although rare today\, th
 ey were factors of 1000 times more prevalent at z~2-5\, contributing signi
 ficantly to the buildup of the Universe's stellar mass and the formation o
 f high-mass galaxies.  However\, an ongoing debate lingers as to their evo
 lutionary origins at high-redshift\, whether or not they are triggered by 
 major mergers of gas-rich disk galaxies\, or if they are solitary galaxies
  continually fed pristine gas from the intergalactic medium.  I will discu
 ss some of the latest observational programs dedicated to understanding th
 eir origins at early times\, including:\n1. the contribution of dust-obscu
 red galaxies to all of cosmic star-formation\,\n2. tools we can use to sur
 mise the physical mechanisms driving such intense star-forming galaxies\, 
 and\n3. what these extreme galaxies can teach us about the formation of ma
 ssive galaxy clusters.
LOCATION:Martin Ryle Seminar Room\, Kavli Institute
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