UMICH-2015: CMB-Lensing break-out session 1

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Lensing autospectrum

(Alex V. leading discussion, ~15 min)

  1. CMB lensing intro
  2. sensitivity to neutrino mass and other parameters (w, $\Omega_k$)
  3. foreground challenges
    • extragalactic polarized sources
      • how big of an issue can they be? The CMBPol study 0811.3916 shows they give small biases under conservative assumptions, particularly if the resolution is high enough to find sources
      • They can also be projected out of the estimator (bias-hardening)
    • Galactic dust
      • Biases from nonzero connected four-point function at high-ell? e.g. 1207.0508
    • Instrumental systematics
    • gain variations, monopole leakagge, quadrupole leakage, pointing offsets

Neelima - CMB halo lensing, mass estimate forecasts, instrument requirements, systematic/foreground challenges (10 min)

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