Primordial helium recombination. I. Feedback, line transfer, and continuum opacity

@article{Switzer2008PrimordialHR,
  title={Primordial helium recombination. I. Feedback, line transfer, and continuum opacity},
  author={E. Switzer and C. Hirata},
  journal={Physical Review D},
  year={2008},
  volume={77},
  pages={083006}
}
Precision measurements of the cosmic microwave background temperature anisotropy on scales l>500 will be available in the near future. Successful interpretation of these data is dependent on a detailed understanding of the damping tail and cosmological recombination of both hydrogen and helium. This paper and two companion papers are devoted to a precise calculation of helium recombination. We discuss several aspects of the standard recombination picture, and then include feedback, radiative… Expand
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