Detection likelihood of cluster-induced CMB polarization
arXiv:1711.03079 · doi:10.1051/0004-6361/201834657
Abstract
Nearby galaxy clusters can potentially induce sub-microkelvin polarization signals in the cosmic microwave background (CMB) at characteristic scales of a few arcminutes. We explore four such polarization signals induced in a rich nearby fiducial cluster and calculate the likelihood of their detection by a telescope project with capabilities such as those of the Simons Observatory (SO). In our feasibility analysis, we include instrumental noise, primordial CMB anisotropy, statistical thermal Sunyaev-Zeldovich (SZ) cluster signal, and point source confusion, assuming a few percent of the nominal telescope observation time of an SO-like project. Our analysis indicates that the thermal SZ intensity can be sensitively mapped in rich nearby clusters and that the kinematic SZ intensity can be measured with high statistical significance toward a fast moving nearby cluster. The detection of polarized SZ signals will be quite challenging but could still be feasible toward several very rich nearby clusters with very high SZ intensity. The polarized SZ signal from a sample of ~20 clusters can be statistically detected at S/N~3, if observed for several months.
11 pages, 4 figures
References in corpus (12)
- The Simons Observatory: Science goals and forecasts
- Planck 2018 results. VII. Isotropy and Statistics of the CMB
- Measurements of Sub-degree B-mode Polarization in the Cosmic Microwave Background from 100 Square Degrees of SPTpol Data
- Measurements of E-Mode Polarization and Temperature-E-Mode Correlation in the Cosmic Microwave Background from 100 Square Degrees of SPTpol Data
- Maps of the Southern Millimeter-wave Sky from Combined 2500 deg SPT-SZ and Planck Temperature Data
- Probing the Universe on Gigaparsec Scales with Remote Cosmic Microwave Background Quadrupole Measurements
- Detecting the polarization induced by scattering of the microwave background quadrupole in galaxy clusters
- Kinetic Sunyaev Zeldovich effect in an anisotropic CMB model: measuring low multipoles of the CMB at higher redshifts using intensity and polarization spectral distortions
- Beyond CMB cosmic variance limits on reionization with the polarized SZ effect
- CMB Polarization due to Scattering in Clusters
- Measuring Polarized Emission in Clusters in the CMB S4 Era
- Evolution of the gas mass fraction in galaxy clusters