The Kinetic Sunyaev-Zel'dovich Effect from Patchy Reionization: the View from the Simulations

Abstract

We present the first calculation of the kinetic Sunyaev-Zel'dovich (kSZ) effect due to the inhomogeneus reionization of the universe based on detailed large-scale radiative transfer simulations of reionization. The resulting sky power spectra peak at l=2000-8000 with maximum values of l(l+1)C_l/(2pi)_{max}~4-7x10^{-13}. The scale roughly corresponds to the typical ionized bubble sizes observed in our simulations, of ~5-20 Mpc. The kSZ anisotropy signal from reionization dominates the primary CMB signal above l=3000. At large scales the patchy kSZ signal depends only on the source efficiencies. It is higher when sources are more efficient at producing ionizing photons, since such sources produce larger ionized regions, on average, than less efficient sources. The introduction of sub-grid gas clumping in the radiative transfer simulations produce significantly more power at small scales, but has little effect at large scales. The patchy reionization kSZ signal is dominated by the post-reionization signal from fully-ionized gas, but the two contributions are of similar order at scales l~3000-10^4, indicating that the kSZ anisotropies from reionization are an important component of the total kSZ signal at these scales.

9 pages, most figures should be viewed in color, to appear in New Astronomy Reviews

References in corpus (3)

• Cosmological Radiative Transfer Codes Comparison Project I: The Static Density Field Tests
• Minihalo photoevaporation during cosmic reionization: evaporation times and photon consumption rates
• Towards optimal parallel PM N-body codes: PMFAST

Cited by in corpus (19)

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• Model-independent constraints on reionization from large-scale CMB polarization
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• Current models of the observable consequences of cosmic reionization and their detectability
• The effect of peculiar velocities on the epoch of reionization (EoR) 21-cm signal
• The Signature of Patchy Reionization in the Polarization Anisotropy of the CMB
• Simulations of the Sunyaev-Zeldovich Effect from Quasars
• Kinetic Sunyaev-Zeldovich effect in modified gravity
• A Linear Perturbation Theory of Inhomogeneous Reionization
• Observing patchy reionization with future CMB polarization experiments
• Detection of pairwise kSZ effect with DESI galaxy clusters and Planck
• The Sunyaev-Zeldovich Effect from Quasar Feedback
• Ultra-light axions and the kinetic Sunyaev-Zel'dovich Effect
• The effect of reionization on the CMB-density correlation
• Constraining primordial non-Gaussianity with CMB-21cm cross-correlations?
• A framework to mitigate patchy reionization contamination on the primordial gravitational wave signal
• Interpreting the HI 21-cm cosmology maps through Largest Cluster Statistics -- I: Impact of the synthetic SKA1-Low observations
• Signature of the interaction between dark sectors in the reionization process