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Gravitational lensing on the Cosmic Microwave Background by gravity waves

We study the effect of a stochastic background of gravitational waves on the gravitational lensing of the Cosmic Microwave Background (CMB) radiation. It has been shown that matter density inhomogeneities produce a smoothing of the acoustic peaks in the angular power spectrum of the CMB anisotropies...

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Detalles Bibliográficos
Autor principal: Mollerach, S
Lenguaje:eng
Publicado: 1998
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.57.1303
http://cds.cern.ch/record/332386
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author Mollerach, S
author_facet Mollerach, S
author_sort Mollerach, S
collection CERN
description We study the effect of a stochastic background of gravitational waves on the gravitational lensing of the Cosmic Microwave Background (CMB) radiation. It has been shown that matter density inhomogeneities produce a smoothing of the acoustic peaks in the angular power spectrum of the CMB anisotropies. A gravitational wave background gives rise to an additional smoothing of the spectrum. For the most simple case of a gravitational wave background arising during a period of inflation, the effect results to be three to four orders of magnitude smaller than its scalar counterpart, and is thus undetectable. It could play a more relevant role in models where a larger background of gravitational waves is produced.
id cern-332386
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1998
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spelling cern-3323862019-09-30T06:29:59Zdoi:10.1103/PhysRevD.57.1303http://cds.cern.ch/record/332386engMollerach, SGravitational lensing on the Cosmic Microwave Background by gravity wavesAstrophysics and AstronomyWe study the effect of a stochastic background of gravitational waves on the gravitational lensing of the Cosmic Microwave Background (CMB) radiation. It has been shown that matter density inhomogeneities produce a smoothing of the acoustic peaks in the angular power spectrum of the CMB anisotropies. A gravitational wave background gives rise to an additional smoothing of the spectrum. For the most simple case of a gravitational wave background arising during a period of inflation, the effect results to be three to four orders of magnitude smaller than its scalar counterpart, and is thus undetectable. It could play a more relevant role in models where a larger background of gravitational waves is produced.astro-ph/9708196oai:cds.cern.ch:3323861998
spellingShingle Astrophysics and Astronomy
Mollerach, S
Gravitational lensing on the Cosmic Microwave Background by gravity waves
title Gravitational lensing on the Cosmic Microwave Background by gravity waves
title_full Gravitational lensing on the Cosmic Microwave Background by gravity waves
title_fullStr Gravitational lensing on the Cosmic Microwave Background by gravity waves
title_full_unstemmed Gravitational lensing on the Cosmic Microwave Background by gravity waves
title_short Gravitational lensing on the Cosmic Microwave Background by gravity waves
title_sort gravitational lensing on the cosmic microwave background by gravity waves
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1103/PhysRevD.57.1303
http://cds.cern.ch/record/332386
work_keys_str_mv AT mollerachs gravitationallensingonthecosmicmicrowavebackgroundbygravitywaves