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SUMMARY:Cosmic Reionization - Dr Chris Carilli\, NRAO
DTSTART:20131204T160000Z
DTEND:20131204T170000Z
UID:TALK48303@talks.cam.ac.uk
CONTACT:Leona Hope-Coles
DESCRIPTION:Cosmic reionization corresponds to the epoch when light from t
 he first stars and black holes reionized the neutral Inter-Galactic Medium
  (IGM) that pervade the Universe following recombination. This period of '
 first new light'\, about 1 Gyr after the Big Bang\, remains the last epoch
  of cosmic structure formation to be tested and explored. I will summarize
  the latest constraints on cosmic reionization\, principally based on the 
 affect of Ly-alpha resonant scattering by the neutral gas. I will then foc
 us on the potential to observe the evolution of the neutral IGM directly t
 hrough the HI 21cm line. This new window on early large scale structure ev
 olution has the potential to provide the 'richest of cosmological data set
 s'\, and is a primary science driver for the Square Kilometer Array. I wil
 l present details of the Precision Array to Probe the Epoch of Reionizatio
 n\, a low frequency SKA-pathfinder experiment in South Africa. PAPER has p
 roduced unprecedented wide field\, low frequency images of the southern sk
 y\, and we have set the best (statistical) limits on the HI 21cm signal fr
 om reionization to date. I will conclude by presenting plans for the Hydro
 gen Epoch of Reionization Array\, a 568 element array in South Africa that
  will provide a detailed characterization of the HI 21cm power spectrum an
 d its evolution\, as well as the potential for direct imaging of the large
 st scale structures during reionization.
LOCATION:Pippard Lecture Theatre\, Cavendish Laboratory
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