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Secondary CMB Anisotropy - Wayne Hu's Tutorials

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B-mode Contamination from Reionization<br />

• Inhomogeneous reionization modulates polarization into B-modes<br />

(Hu 2000)<br />

• Large signals if ionization bubbles >100Mpc at z~20-30<br />

Mortonson & Hu (2006)<br />

∆ l 2 [nK 2 ]<br />

10 5<br />

10 4<br />

10 3<br />

10 2<br />

10<br />

10<br />

500Mpc<br />

100 1000<br />

multipole l<br />

lensing<br />

50Mpc<br />

z i=30; τ=0.12<br />

Potentially removeable<br />

if large:<br />

Dvorkin & Smith (2008)

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