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SUMMARY:21cm Cosmology\, in Principle and Practice - Simon Foreman
DTSTART:20200127T130000Z
DTEND:20200127T140000Z
UID:TALK135925@talks.cam.ac.uk
CONTACT:William Coulton
DESCRIPTION:Intensity mapping of redshifted 21cm emission from neutral hyd
 rogen holds vast promise for learning about cosmology\, as it provides an 
 efficient way to map large volumes of the universe without the need to cha
 racterize individual objects. In the first part of the talk\, I will prese
 nt the concept for the Packed Ultra-wideband Mapping Array (PUMA)\, a prop
 osed next-generation experiment capable of performing intensity mapping ov
 er large sky areas up to redshift 6. I will review the primary scientific 
 drivers for such an experiment\, and highlight some secondary applications
 \, including weak gravitational lensing of 21cm fluctuations and wave-opti
 cal effects in microlensing of radio sources. In the second part of the ta
 lk\, I will provide an update on the status of the Canadian Hydrogen Inten
 sity Mapping Experiment (CHIME)\, focusing on the outstanding challenges t
 o extracting cosmological results and the methods being pursued to overcom
 e these challenges.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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