Will Nonlinear Peculiar Velocity and Inhomogeneous Reionization Spoil 21cm Cosmology from the Epoch of Reionization?
arXiv:1211.2036 · doi:10.1103/PhysRevLett.110.151301
Abstract
The 21cm background from the epoch of reionization is a promising cosmological probe: line-of-sight velocity fluctuations distort redshift, so brightness fluctuations in Fourier space depend upon angle, which linear theory shows can separate cosmological from astrophysical information. Nonlinear fluctuations in ionization, density and velocity change this, however. The validity and accuracy of the separation scheme are tested here for the first time, by detailed reionization simulations. The scheme works reasonably well early in reionization (< 40% ionized), but not late (> 80% ionized).
arXiv comment2 figures, matches published PRL version
References in corpus (9)
- Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- Cosmological parameters from CMB and other data: a Monte-Carlo approach
- A Method for Separating the Physics from the Astrophysics of High-Redshift 21cm Fluctuations
- C^2-Ray: A new method for photon-conserving transport of ionizing radiation
- Perturbation Theory Reloaded: Analytical Calculation of Non-linearity in Baryonic Oscillations in the Real Space Matter Power Spectrum
- Redshift Space Distortion of the 21cm Background from the Epoch of Reionization I: Methodology Re-examined
- Light cone effect on the reionization 21-cm power spectrum
- Can 21-cm observations discriminate between high-mass and low-mass galaxies as reionization sources?
- Higher Order Contributions to the 21 cm Power Spectrum
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