A numerical study of observational systematic errors in lensing analysis of CMB polarization. (9th April 2021)

• Record Type: Journal Article
• Authors: Nagata, Ryo; Namikawa, Toshiya
• Is Part Of: Progress of theoretical and experimental physics. Volume 2021:Number 5(2021)
• Publication Date: 2021-04-09
• Subjects: E60 -- E62 -- E63; Physics -- Periodicals; Mathematical physics -- Periodicals; 530.05
• DOI: 10.1093/ptep/ptab040
• Languages: English
• ISSNs: 2050-3911

Abstract

Abstract: Impacts of observational systematic errors on the lensing analysis of the cosmic microwave background (CMB) polarization are investigated by numerical simulations. We model errors of gain, angle, and pointing in observation of the CMB polarization and simulate polarization fields modulated by the errors. We discuss the response of systematics-induced $B$ -modes to amplitude and spatial scale of the imposed errors and show that the results of the lensing reconstruction and delensing analysis behave according to it. It is observed that error levels expected in the near future lead to no significant degradation in delensing efficiency.