期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 6, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2012/06/014
关键词
gravitational waves and CMBR polarization; cosmological parameters from CMBR
资金
- Lyman Spitzer fellowship in the Department of Astrophysical Sciences at Princeton University
- Institute for Advanced Study Member
- NSF [AST-0807444]
- U.S. Department of Energy [DE-FG03-92-ER40701]
- National Science Foundation [AST-0807337]
- Alfred P. Sloan Foundation
- Berkeley Center for Cosmological Physics
- NASA Mission Concept Study [NNX08AT71G S01]
One of the primary scientific targets of current and future CMB polarization experiments is the search for a stochastic background of gravity waves in the early universe. As instrumental sensitivity improves, the limiting factor will eventually be B-mode power generated by gravitational lensing, which can be removed through use of so-called delensing algorithms. We forecast prospects for delensing using lensing maps which are obtained externally to CMB polarization: either from large-scale structure observations, or from high-resolution maps of CMB temperature. We conclude that the forecasts in either case are not encouraging, and that significantly delensing large-scale CMB polarization requires high-resolution polarization maps with sufficient sensitivity to measure the lensing B-mode. We also present a simple formalism for including delensing in CMB forecasts which is computationally fast and agrees well with Monte Carlos.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据