Volume 475, Number 1, November III 2007
|Page(s)||109 - 114|
|Section||Cosmology (including clusters of galaxies)|
|Published online||02 October 2007|
Cosmological hydrogen recombination: Lyn line feedback and continuum escape
Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85741 Garching bei München, Germany e-mail: firstname.lastname@example.org
2 Space Research Institute, Russian Academy of Sciences, Profsoyuznaya 84/32, 117997 Moscow, Russia
Accepted: 16 September 2007
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- transitions yields a maximal correction of at . Including only Lyman-β feedback onto the Lyman-α 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 and at . The escape in the Lyman-continuum and feedback of Lyman-α photons on the photoionization rate of the second shell lead to modifications of the ionization history which are very small (less than ).
Key words: cosmic microwave background / cosmology: miscellaneous
© ESO, 2007
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