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Cosmic 21 cm delensing of microwave background polarization and the minimum detectable energy scale of inflation

Sigurdson, Kris and Cooray, Asantha (2005) Cosmic 21 cm delensing of microwave background polarization and the minimum detectable energy scale of inflation. Physical Review Letters, 95 (21). Art. No. 211303. ISSN 0031-9007. doi:10.1103/PhysRevLett.95.211303.

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We propose a new method for removing gravitational lensing from maps of cosmic microwave background (CMB) polarization anisotropies. Using observations of anisotropies or structures in the cosmic 21 cm radiation, emitted or absorbed by neutral hydrogen atoms at redshifts 10 to 200, the CMB can be delensed. We find this method could allow CMB experiments to have increased sensitivity to a background of inflationary gravitational waves (IGWs) compared to methods relying on the CMB alone and may constrain models of inflation which were heretofore considered to have undetectable IGW amplitudes.

Item Type:Article
Related URLs:
URLURL TypeDescription
Sigurdson, Kris0000-0002-6729-0765
Cooray, Asantha0000-0002-3892-0190
Additional Information:© 2005 The American Physical Society. Received 28 February 2005; published 16 November 2005. K.S. acknowledges the support of NSERC of Canada. This work was supported in part by NASA NAG5-9821 and DOE DE-FG03-92-ER40701.
Funding AgencyGrant Number
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Department of Energy (DOE)DE-FG03-92-ER40701
Subject Keywords:gravitational lenses; radiofrequency cosmic radiation; astronomical polarimetry; cosmology; hydrogen neutral atoms
Issue or Number:21
Record Number:CaltechAUTHORS:SIGprl05
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3510
Deposited By: Tony Diaz
Deposited On:12 Jun 2006
Last Modified:08 Nov 2021 19:56

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