Secondary Ionization in a Flat Universe
Abstract
We analyze the effect of a secondary ionization on the evolution of temperature fluctuations in cosmic background radiation. The main results presented in this paper are appropriate analytic expressions of the transfer function relating temperature fluctuations to matter density perturbations at recombination for all possible recombination histories. Furthermore, we particularize our calculation to the standard cold dark matter model, where we study the erasure of primordial temperature fluctuations and calculate the magnitude and angular scale of the damping induced by a late recombination.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- January 1994
- DOI:
- 10.1086/173539
- Bibcode:
- 1994ApJ...420...26A
- Keywords:
-
- Background Radiation;
- Dark Matter;
- Ionization;
- Radiative Transfer;
- Universe;
- Cosmology;
- Galactic Evolution;
- Recombination Reactions;
- Temperature Gradients;
- Space Radiation;
- COSMOLOGY: COSMIC MICROWAVE BACKGROUND;
- COSMOLOGY: DARK MATTER;
- COSMOLOGY: THEORY;
- RADIATIVE TRANSFER