Primordial helium recombination. III. Thomson scattering, isotope shifts, and cumulative results

@article{Switzer2008PrimordialHR,
  title={Primordial helium recombination. III. Thomson scattering, isotope shifts, and cumulative results},
  author={E. Switzer and C. Hirata},
  journal={Physical Review D},
  year={2008},
  volume={77},
  pages={083008}
}
Upcoming precision measurements of the temperature anisotropy of the cosmic microwave background at high multipoles will need to be complemented by a more complete understanding of recombination, which determines the damping of anisotropies on these scales. This is the third in a series of papers describing an accurate theory of He i and He ii recombination. Here we describe the effect of Thomson scattering, the $^{3}\mathrm{He}$ isotope shift, the contribution of rare decays, collisional… Expand
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