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SUMMARY:Star formation and nuclear activity in hidden massive galaxies at 
 high redshifts - Karina Caputi (Kapteyn Astronomical Institute\, Universit
 y of Groningen)
DTSTART:20140401T153000Z
DTEND:20140401T163000Z
UID:TALK51497@talks.cam.ac.uk
CONTACT:David Titterington
DESCRIPTION:Spitzer deep images have revealed the existence of mid-IR sour
 ces that are faint\, or even undetected\, in some of the deepest HST maps\
 , with colours H-[4.5]>4 (AB).  These extremely red colours can be produce
 d by the combined effect of high redshifts and significant dust attenuatio
 ns.  In the first part of my talk\, I will present our recent study of suc
 h sources using the deep Spitzer SEDS and HST CANDELS images of the UDS fi
 eld.  I will argue that most of these sources are dust-obscured\, massive 
 galaxies at z>3.  In the second part of the talk\, I will show the results
  of a pilot project to follow a subset of these galaxies up at sub-/millim
 etre wavelengths.  Finally\, I will do a combined analysis of the multi-wa
 velength information for these objects\, and discuss the implications of o
 ur findings.\n
LOCATION:Martin Ryle Seminar Room\, Kavli Institute
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