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SUMMARY:B modes: component separation using Gibbs sampling in the context 
 of the SPIDER experiment - Benjamin Racine (UiO Oslo)
DTSTART:20170206T130000Z
DTEND:20170206T140000Z
UID:TALK70171@talks.cam.ac.uk
CONTACT:47984
DESCRIPTION:Detecting B-modes due to inflationary gravitational waves in t
 he polarization of the Cosmic Microwave Background is one of the greatest 
 goals of modern observational cosmology. Many experiments have been design
 ed to detect this weak signal\, and upper limits are improving year by yea
 r. In fact\, while B-modes have now been clearly observed\, these are not 
 of inflationary origin\, but rather induced by late time effects. At large
  scales\, the signal is most probably dominated by the galactic dust\, whe
 reas at small scale\, it is due to gravitational lensing. \nIn this talk I
  will give a general introduction to CMB polarization and B modes\, and sh
 ow some recent observational highlights. I will then review the problem of
  component separation\, and present a recently developed method for joint 
 estimation of cosmological parameters and astrophysical foregrounds. Final
 ly\, I will discuss how this may be applied to observations from the SPIDE
 R balloon borne experiment.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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