2017/07/31 by Thibaut Louis, Emory F. Bunn, B. D. Wandelt +2
Physics and Astronomy · #Anisotropy #Astrophysics #Atomic physics #Cluster (spacecraft) #Computer science #Cosmic microwave background #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Noise (video) #Optics #Physics #Quadrupole #Residual #SIGNAL (programming language) #Scattering #Stellar, planetary, and galactic studies #Telescope #astro-ph.CO
paper · pdf · doi:10.1103/physrevd.96.123509
published as Phys. Rev. D 96, 123509 (2017) · 10 pages, 7 figures, version matching the one published in PRD
arxiv created 2017/11/20 · openalex publication_date 2017/12/06 · arxiv updated 2017/12/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
The next generation of CMB experiments (CMB Stage-4) will produce a Sunyaev-Zel'dovich (SZ) cluster catalog containing \ensuremath∼105 objects, two orders of magnitudes more than currently available. In this paper, we discuss the detectability of the polarized signal generated by scattering of the CMB quadrupole on the cluster electron gas using this catalog. We discuss the possibility of using this signal to measure the relationship between cluster optical depth and mass. We find that the area of observation of S4 maximizes the signal-to-noise (S/N) on the polarized signal but that this S/N is extremely small for an individual cluster, of order 0.5% for a typical cluster in our catalog, the main source of noise being the residual primordial E-mode signal. However, we find that the signal could be detected using the full cluster catalog and that the significance of the result will increase linearly with the size of the CMB S4 telescope mirror.