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SUMMARY:The Obscured Universe: from Peak Star-Formation to Reionization - 
 Caitlin Casey (Univerity of Texas)
DTSTART:20200514T150000Z
DTEND:20200514T160000Z
UID:TALK141682@talks.cam.ac.uk
CONTACT:Dr Annelies Mortier
DESCRIPTION:Although rare in the nearby Universe\, gas-rich galaxies with 
 extraordinary star-formation rates (100-1000x the Milky Way\, at >100 Msun
 /year) represent the typical massive galaxy in the early Universe 10 billi
 on years ago.  These galaxies’ high star-formation rates are predominant
 ly obscured by dust which absorbs and re-radiates >95% of the energy from 
 massive stars in the (sub)millimeter/far-infrared\, hence they are often c
 alled dusty star-forming galaxies (DSFGs).  Thanks to facilities like the 
 Herschel Space Observatory in the early 2010s\, we have successfully mappe
 d the contribution of such DSFGs to cosmic star-formation from z=0 back to
  z=2\, where it appears they are factors of 1000x more common than they ar
 e locally and\, indeed\, dominate.  I will discuss current efforts underwa
 y with ALMA to take an unbiased census of completely obscured galaxies fro
 m z=2 towards the Epoch of Reionization.  The detection of incredibly dust
 -rich systems (>10^9 Msun of dust) at these early epochs are key to unders
 tanding both the early formation mechanisms of dust (from supernovae\, AGB
  stars and via grain growth in the ISM) and the assembly history of the Un
 iverse’s most massive galaxies and their rich\, over dense environments.
 \n
LOCATION:ONLINE - Details will be sent by email
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