Precise cosmological parameter estimation using CosmoRec
arXiv:1102.3683 · doi:10.1111/j.1365-2966.2011.18782.x
Abstract
We use the new cosmological recombination code, CosmoRec, for parameter estimation in the context of (future) precise measurements of the CMB temperature and polarization anisotropies. We address the question of how previously neglected physical processes in the recombination model of Recfast affect the determination of key cosmological parameters, for the first time performing a model-by-model computation of the recombination problem. In particular we ask how the biases depend on different combinations of parameters, e.g. when varying the helium abundance or the effective number of neutrino species in addition to the standard six parameters. We also forecast how important the recombination corrections are for a combined Planck, ACTPol and SPTpol data analysis. Furthermore, we ask which recombination corrections are really crucial for CMB parameter estimation, and whether an approach based on a redshift-dependent correction function to Recfast is sufficient in this context.
12 pages, 7 figures, submitted to MNRAS
References in corpus (19)
- Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
- HyRec: A fast and highly accurate primordial hydrogen and helium recombination code
- ACTPol: A polarization-sensitive receiver for the Atacama Cosmology Telescope
- Contraints on radiative dark-matter decay from the cosmic microwave background
- Ultrafast effective multi-level atom method for primordial hydrogen recombination
- How well do we understand cosmological recombination?
- The impacts of dark matter particle annihilation on recombination and the anisotropies of the cosmic microwave background
- Formation of Massive Primordial Stars in a Reionized Gas
- Lines in the cosmic microwave background spectrum from the epoch of cosmological helium recombination
- Primordial helium recombination I: feedback, line transfer, and continuum opacity
- Cosmological hydrogen recombination: populations of the high level sub-states
- Two-photon transitions in hydrogen and cosmological recombination
- Effects of primordial chemistry on the cosmic microwave background
- Two-photon transitions in primordial hydrogen recombination
- The effect of forbidden transitions on cosmological hydrogen and helium recombination
- Two-Photon 2s<->1s Transitions during Recombination of Hydrogen in the Universe
- Rapid HeII->HeI recombination and radiation concerned with this process
- Cosmic rays and the primordial gas
- Virtual Resonant States in Two-Photon Decay Processes: Lower-Order Terms, Subtractions, and Physical Interpretations
Cited by in corpus (25)
- Planck 2015 results. XIII. Cosmological parameters
- Planck 2013 results. XVI. Cosmological parameters
- An absorption profile centred at 78 megahertz in the sky-averaged spectrum
- CMB power spectrum parameter degeneracies in the era of precision cosmology
- The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
- Probing the inflaton: Small-scale power spectrum constraints from measurements of the CMB energy spectrum
- Planck 2018 results. VI. Cosmological parameters
- Exploring Cosmic Origins with CORE: Cosmological Parameters
- WMAP7 and future CMB constraints on annihilating dark matter: implications for GeV-scale WIMPs
- New constraints on time-dependent variations of fundamental constants using Planck data
- H0 tension or T0 tension?
- On the detection of spectral ripples from the Recombination Epoch
- CosmoSpec: Fast and detailed computation of the cosmological recombination radiation from hydrogen and helium
- HYREC-2: a highly accurate sub-millisecond recombination code
- Varying fundamental constants principal component analysis: additional hints about the Hubble tension
- Reionization and dark matter decay
- Radiative transfer effects during primordial helium recombination
- Constraints on perturbations to the recombination history from measurements of the CMB damping tail
- Sensitivity forecasts for the cosmological recombination radiation in the presence of foregrounds
- Improved model-independent constraints on the recombination era and development of a direct projection method
- The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: constraints on the time variation of fundamental constants from the large-scale two-point correlation function
- New Horizons in Cosmology with Spectral Distortions of the Cosmic Microwave Background
- Advanced Three Level Approximation for Numerical Treatment of Cosmological Recombination
- The Thermal Sunyaev-Zeldovich Effect of Primordial Recombination Radiation
- Does the Reionization Model Influence the Constraints on Dark Matter Decay or Annihilation?