Cosmological hydrogen recombination: Lyn line feedback and continuum escape

We compute the corrections to the cosmological hydrogen recombination history due to delayed feedback of Lyman- series photons and the escape in the Lyman- continuum. The former process is expected to slightly delay recombination, while the latter should allow the medium to recombine a bit faster. It is shown that the subsequent feedback of released Lyman- n photons on the lower lying Lyman-(n-1) transitions yields a maximal correction of Delta N-e/N-e similar to 0.22% at z similar to 1050. Including only Lyman-beta feedback onto the Lyman-alpha transition, accounts for most of the effect. We find corrections to the cosmic microwave background TT and EE power spectra with typical peak to peak amplitude |Delta C-l(TT)/C-l(TT) |similar to 0.15% and |Delta C-l(EE) /C-l(EE) |similar to 0.36% at l less than or similar to 3000. The escape in the Lymancontinuum and feedback of Lyman-alpha photons on the photoionization rate of the second shell lead to modifications of the ionization history which are very small ( less than |Delta N-e/N-e| similar to few x 10(-6)).