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CMBPol Mission Concept Study: Reionization Science with the Cosmic Microwave Background

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arxiv 0811.3918 v1 pith:4U5LZ2XX submitted 2008-11-24 astro-ph

CMBPol Mission Concept Study: Reionization Science with the Cosmic Microwave Background

classification astro-ph
keywords polarizationreionizationlargeprobesscalecmbpolepochacross
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We summarize existing constraints on the epoch of reionization and discuss the observational probes that are sensitive to the process. We focus on the role large scale polarization can play. Polarization probes the integrated optical depth across the entire epoch of reionization. Future missions such as Planck and CMBPol will greatly enhance our knowledge of the reionization history, allowing us to measure the time evolution of the ionization fraction. As large scale polarization probes high redshift activity, it can best constrain models where the Universe was fully or partially ionized at early times. In fact, large scale polarization could be our only probe of the highest redshifts.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Boosting the optical depth to Thomson scattering with primordial black hole evaporation at high redshift

    astro-ph.CO 2026-08 accept novelty 6.0

    A monochromatic primordial black hole population can raise the CMB optical depth by at most Delta tau ~ 0.008 under current CMB data, leaving BAO-CMB tensions essentially unchanged.

  2. The Impact of Population III.1 Flash Reionization for CMB Polarization and Thomson Scattering Optical Depth

    astro-ph.CO 2025-10 conditional novelty 5.0

    An early 'Pop III.1 Flash' reionization phase shifts CMB polarization power from l<8 to l>8, allowing a higher optical depth τ≈0.08–0.09 while staying closer to Planck's low-l EE data than a standard tanh reionization model.