Faithin Omaha eBook Collection

Download or read book A 2500 Square-degree Cosmic Microwave Background Lensing Map from Combined South Pole Telescope and Planck Temperature Data, and Cross-correlation with Large-scale Structure written by Yuki Omori and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The cosmic microwave background (CMB) is one of the prime observables in studying cosmology. With the increased sensitivity and frequency coverage, the recent CMB experiments have allowed us to investigate subtle secondary e ects such as gravitational lensing. In this thesis, the theoret- ical background of CMB lensing is described, and the methods used to reconstruct a map of the gravitational lensing potential is outlined. The methodology is applied to temperature data ob- tained by the South Pole Telescope and Planck, and the resulting lensing map is presented. We perform numerous tests to verify that the lensing map is not dominated by systematic errors. This lensing map will be correlated with other probes of large-scale stucture, namely galaxy density and galaxy weak lensing. We simulate each of these data sets using Flask, a code that produces maps of correlated elds. Using the suite of simulation realizations, we calculate the correlations between the probes and estimate the covariance. The two-point correlation measure- ments for the individual probes are then combined to constrain cosmology. Finally we discuss the future landscape of multi-probe cosmological analyses." --