A Large Sky Simulation of the Gravitational Lensing of the Cosmic Microwave Background

Abstract

Large scale structure deflects cosmic microwave background (CMB) photons. Since large angular scales in the large scale structure contribute significantly to the gravitational lensing effect, a realistic simulation of CMB lensing requires a sufficiently large sky area. We describe simulations that include these effects, and present both effective and multiple plane ray-tracing versions of the algorithm, which employs spherical harmonic space and does not use the flat sky approximation. We simulate lensed CMB maps with an angular resolution of ~0.9 arcmin. The angular power spectrum of the simulated sky agrees well with analytical predictions. Maps generated in this manner are a useful tool for the analysis and interpretation of upcoming CMB experiments such as PLANCK and ACT.

14 pages, 12 figures, replaced with version accepted for publication by the APJ

References in corpus (7)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Detection of Gravitational Lensing in the Cosmic Microwave Background
• Cosmological Information from Lensed CMB Power Spectra
• Microwave-Sky Simulations and Projections for Galaxy Cluster Detection with the Atacama Cosmology Telescope
• Supernovae, Lensed CMB and Dark Energy
• Detectability of CMB tensor B modes via delensing with weak lensing galaxy surveys
• CMB Cluster Lensing: Cosmography with the Longest Lever Arm

Cited by in corpus (13)

• Full-sky Gravitational Lensing Simulation for Large-area Galaxy Surveys and Cosmic Microwave Background Experiments
• The onion universe: all sky lightcone simulations in spherical shells
• Full-Sky Weak Lensing Simulation with 70 Billion Particles
• Fast and Exact Spin-s Spherical Harmonic Transforms
• ICE-COLA: fast simulations for weak lensing observables
• DEMNUni: The imprint of massive neutrinos on the cross-correlation between cosmic voids and CMB lensing
• Multiple Lensing of the Cosmic Microwave Background anisotropies
• Comparison of delensing methodologies and assessment of the delensing capabilities of future experiments
• Fast CMB lensing using statistical interpolation on the sphere
• Biases to primordial non-Gaussianity measurements from CMB secondary anisotropies
• Accurate relativistic observables from post-processing light cone catalogues
• The spherical Fast Multipole Method (sFMM) for Gravitational Lensing Simulation
• Cluster optical depth and pairwise velocity estimation using machine learning