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SUMMARY:Cosmology from the kinetic Sunyaev-Zeldovich effect in the CMB - K
 endrick Smith (Perimeter Institute)
DTSTART:20220509T150000Z
DTEND:20220509T160000Z
UID:TALK174053@talks.cam.ac.uk
CONTACT:Dongwon Han
DESCRIPTION:The kinetic Sunyaev-Zeldovich (kSZ) effect is the largest cont
 ribution to the cosmic microwave background (CMB) on small angular scales.
  Near-future CMB experiments (Simons Observatory\, CMB-S4) will measure th
 e kSZ effect with total signal-to-noise ~10^3. Despite the imminence of pr
 ecise measurements\, there are not many proposals for constraining cosmolo
 gical parameters with the kSZ effect. This is because the kSZ effect is a 
 complicated mix of cosmological information (large-scale velocities) and a
 strophysics (small-scale electron inhomogeneities).\n\nI'll present two pr
 oposals for disentangling kSZ cosmology from astrophysics. First\, "kSZ ve
 locity reconstruction"\, which reconstructs large-scale 3-d cosmological m
 odes\, by combining kSZ measurements with an overlapping galaxy field. Thi
 s is the best way to reconstruct cosmological modes on large scales (param
 etrically better than galaxy surveys or lensing) and will help constrain p
 rimordial non-Gaussianity. Second\, I'll describe a four-point statistic (
 the "power spectrum of the power spectrum") which can constrain the epoch 
 of inhomogeneous reionization\, where there are few observational probes.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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