Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Imprint of Reionization on the Cosmic Microwave Background Bispectrum   We study contributions to the cosmic microwave background (CMB) bispectrum
from non-Gaussianity induced by secondary anisotropies during reionization.
Large-scale structure in the reionized epoch both gravitational lenses CMB
photons and produces Doppler shifts in their temperature from scattering off
electrons in infall. The resulting correlation is potentially observable
through the CMB bispectrum. The second-order Ostriker-Vishniac also couples to
a variety of linear secondary effects to produce a bispectrum. For the
currently favored flat cosmological model with a low matter content and small
optical depth in the reionized epoch $\tau \la 0.3$, however, these bispectrum
contributions are well below the detection threshold of MAP and at or below
that of Planck, given their cosmic and noise variance limitations. At the upper
end of this range, they can serve as an extra source of noise for measurements
with Planck of either primordial nongaussianity or that induced by the
correlation of gravitational lensing with the integrated Sachs-Wolfe and the
thermal Sunyaev-Zel'dovich effects. We include a discussion of the general
properties of the CMB bispectrum, its configuration dependence for the various
effects, and its computation in the Limber approximation and beyond.

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The categories of this paper are: solv-int
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The categories of this paper are: alg-geom
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The categories of this paper are: q-bio
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The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-th
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The categories of this paper are: math-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
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The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: q-alg
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The categories of this paper are: bayes-an