Research articles

search articles

My Pages

Stat

Members: 3645
Articles: 2'500'096
Articles rated: 2609

19 April 2024

» arxiv » 1701.4396

Article overview

CMB Polarization B-mode Delensing with SPTpol and Herschel
A. Manzotti ; K. T. Story ; W. L. K. Wu ; J. E. Austermann ; J. A. Beall ; A. N. Bender ; B. A. Benson ; L. E. Bleem ; J. J. Bock ; J. E. Carlstrom ; C. L. Chang ; H. C. Chiang ; H-M. Cho ; R. Citron ; A. Conley ; T. M. Crawford ; A. T. Crites ; T. de Haan ; M. A. Dobbs ; S. Dodelson ; W. Everett ; J. Gallicchio ; E. M. George ; A. Gilbert ; N. W. Halverson ; N. Harrington ; J. W. Henning ; G. C. Hilton ; G. P. Holder ; W. L. Holzapfel ; S. Hoover ; Z. Hou ; J. D. Hrubes ; N. Huang ; J. Hubmayr ; K. D. Irwin ; R. Keisler ; L. Knox ; A. T. Lee ; E. M. Leitch ; D. Li ; J. J. McMahon ; S. S. Meyer ; L. M. Mocanu ; T. Natoli ; J. P. Nibarger ; V. Novosad ; S. Padin ; C. Pryke ; C. L. Reichardt ; J. E. Ruhl ; B. R. Saliwanchik ; J.T. Sayre ; K. K. Schaffer ; G. Smecher ; A. A. Stark ; K. Vanderlinde ; J. D. Vieira ; M. P. Viero ; G. Wang ; N. Whitehorn ; V. Yefremenko ; M. Zemcov ;
Date:	16 Jan 2017
Abstract:	We present a demonstration of delensing the observed cosmic microwave background (CMB) B-mode polarization anisotropy. This process of reducing the gravitational-lensing generated B-mode component will become increasingly important for improving searches for the B modes produced by primordial gravitational waves. In this work, we delens B-mode maps constructed from multi-frequency SPTpol observations of a 90 deg$^2$ patch of sky by subtracting a B-mode template constructed from two inputs: SPTpol E-mode maps and a lensing potential map estimated from the $ extit{Herschel}$ $500,mu m$ map of the CIB. We find that our delensing procedure reduces the measured B-mode power spectrum by 28% in the multipole range $300 < ell < 2300$; this is shown to be consistent with expectations from theory and simulations and to be robust against systematics. The null hypothesis of no delensing is rejected at $6.9 sigma$. Furthermore, we build and use a suite of realistic simulations to study the general properties of the delensing process and find that the delensing efficiency achieved in this work is limited primarily by the noise in the lensing potential map. We demonstrate the importance of including realistic experimental non-idealities in the delensing forecasts used to inform instrument and survey-strategy planning of upcoming lower-noise experiments, such as CMB-S4.
Source:	arXiv, 1701.4396
Services:	Forum \| Review \| PDF \| Favorites

No review found.

Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

ScienXe.org
» my Online CV
» Free

News, job offers and information for researchers and scientists:

home

contact

sitemap