Reconstructing large scales at cosmic dawn

Abstract

The cosmic microwave background (CMB) serves as a backlight to large-scale structure during the epoch of reionization, where Thomson scattering gives rise to temperature anisotropies on small angular scales from the kinetic Sunyaev Zel'dovich (kSZ) effect. In this paper, we demonstrate that the technique of kSZ tomography (velocity reconstruction), based on cross correlations between CMB temperature and 21cm surveys, can significantly improve constraints on models of inhomogeneous reionization and provide information about large-scale modes that are poorly characterized by 21cm measurements themselves due to foreground contamination.

5+1 pages, comments welcome

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Cited by in corpus (17)

• The Benefits of CMB Delensing
• Cosmology with the moving lens effect
• Probing cosmic birefringence with polarized Sunyaev-Zel'dovich tomography
• Retrieving cosmological information from small-scale CMB foregrounds II. The kinetic Sunyaev Zel'dovich effect
• Velocity reconstruction with the cosmic microwave background and galaxy surveys
• Reconstructing Patchy Reionization with Deep Learning
• Cosmology from the kinetic polarized Sunyaev Zel'dovich effect
• Subtracting the kinetic Sunyaev-Zeldovich effect from the cosmic microwave background with surveys of large-scale structure
• Probing helium reionization with kinetic Sunyaev Zel'dovich tomography
• Transverse velocities and matter gradient correlations: a new signal and a new challenge to moving-lens analyses
• Cosmological probes of helium reionization
• Reconstructing patchy helium reionization using the cosmic microwave background and large-scale structure
• Maximum likelihood kinetic Sunyaev Zel'dovich velocity reconstruction
• Cross-correlating the patchy screening and kinetic Sunyaev-Zel'dovich effects as a new probe of reionization
• Clustering redshifts with the 21cm-galaxy cross-bispectrum
• A Novel kinetic Sunyaev-Zel'dovich Estimator for Electron-Electron Correlations
• Squared-field cross-correlation between kinetic Sunyaev-Zel'dovich effect and 21-cm intensity mapping