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SUMMARY:Non-Gaussian Statistics of Cosmic Microwave Background Secondary A
 nisotropies: Signals and Primordial Contaminants - Colin Hill (IAS/CCA) 
DTSTART:20190513T120000Z
DTEND:20190513T130000Z
UID:TALK121363@talks.cam.ac.uk
CONTACT:Sadra Jazayeri
DESCRIPTION:Observations of the cosmic microwave background (CMB) radiatio
 n have driven the current era of precision cosmology.  Nevertheless\, subs
 tantial information remains to be extracted from the CMB temperature "seco
 ndary anisotropies" generated by effects between our vantage point and the
  surface of last scattering.  These signals\, including gravitational lens
 ing and the thermal and kinematic Sunyaev-Zel’dovich (SZ) effects\, also
  contain valuable cosmological information (e.g.\, about neutrino masses) 
 and astrophysical information (e.g.\, about the distributions of baryons a
 nd dark matter).  However\, these effects can also contaminate measurement
 s of the primordial universe relying on information in the primary CMB ani
 sotropies.  I will present calculations of such biases on CMB-temperature-
 based estimates of primordial non-Gaussianity\, which could have implicati
 ons for results from the Planck satellite.  I will then discuss ongoing wo
 rk to robustly extract secondary anisotropy signals in data from the Ataca
 ma Cosmology Telescope via a novel component-separation pipeline\, as well
  as next-generation forecasts for the Simons Observatory (SO)\, which will
  begin observations in the early 2020s.  I will conclude by presenting a n
 ovel analytic model for the one-point PDF of the thermal SZ field\, a part
 icularly powerful probe of the amplitude of density fluctuations.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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