Do we care about the distance to the CMB? Clarifying the impact of second-order lensing

It has recently been shown that second-order corrections to the background distance-redshift relation can build up significantly at large redshifts, due to an aggregation of gravitational lensing events. This shifts the expectation value of the distance to the CMB by 1%. In this paper we show that t...

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Detalles Bibliográficos
Autores principales: Bonvin, Camille, Clarkson, Chris, Durrer, Ruth, Maartens, Roy, Umeh, Obinna
Lenguaje:eng
Publicado: 2015
Materias:
Astrophysics and Astronomy
Acceso en línea:https://dx.doi.org/10.1088/1475-7516/2015/06/050
http://cds.cern.ch/record/2004544
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author Bonvin, Camille
Clarkson, Chris
Durrer, Ruth
Maartens, Roy
Umeh, Obinna
author_facet Bonvin, Camille
Clarkson, Chris
Durrer, Ruth
Maartens, Roy
Umeh, Obinna
author_sort Bonvin, Camille
collection CERN
description It has recently been shown that second-order corrections to the background distance-redshift relation can build up significantly at large redshifts, due to an aggregation of gravitational lensing events. This shifts the expectation value of the distance to the CMB by 1%. In this paper we show that this shift is already properly accounted for in standard CMB analyses. We clarify the role that the distance to the CMB plays in the presence of second-order lensing corrections.
id cern-2004544
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2015
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spelling cern-20045442023-10-04T21:42:52Zdoi:10.1088/1475-7516/2015/06/050http://cds.cern.ch/record/2004544engBonvin, CamilleClarkson, ChrisDurrer, RuthMaartens, RoyUmeh, ObinnaDo we care about the distance to the CMB? Clarifying the impact of second-order lensingAstrophysics and AstronomyIt has recently been shown that second-order corrections to the background distance-redshift relation can build up significantly at large redshifts, due to an aggregation of gravitational lensing events. This shifts the expectation value of the distance to the CMB by 1%. In this paper we show that this shift is already properly accounted for in standard CMB analyses. We clarify the role that the distance to the CMB plays in the presence of second-order lensing corrections.It has recently been shown that second-order corrections to the background distance-redshift relation can build up significantly at large redshifts, due to an aggregation of gravitational lensing events. This shifts the expectation value of the distance to the CMB by 1%. In this paper we show that this shift is already properly accounted for in standard CMB analyses. We clarify the role that the area distance to the CMB plays in the presence of second-order lensing corrections.It has recently been shown that second-order corrections to the background distance-redshift relation can build up significantly at large redshifts, due to an aggregation of gravitational lensing events. This shifts the expectation value of the distance to the CMB by 1%. In this paper we show that this shift is already properly accounted for in standard CMB analyses. We clarify the role that the area distance to the CMB plays in the presence of second-order lensing corrections.arXiv:1503.07831CERN-PH-TH-2015-062CERN-PH-TH-2015-062oai:cds.cern.ch:20045442015-03-26
spellingShingle Astrophysics and Astronomy
Bonvin, Camille
Clarkson, Chris
Durrer, Ruth
Maartens, Roy
Umeh, Obinna
Do we care about the distance to the CMB? Clarifying the impact of second-order lensing
title Do we care about the distance to the CMB? Clarifying the impact of second-order lensing
title_full Do we care about the distance to the CMB? Clarifying the impact of second-order lensing
title_fullStr Do we care about the distance to the CMB? Clarifying the impact of second-order lensing
title_full_unstemmed Do we care about the distance to the CMB? Clarifying the impact of second-order lensing
title_short Do we care about the distance to the CMB? Clarifying the impact of second-order lensing
title_sort do we care about the distance to the cmb? clarifying the impact of second-order lensing
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1088/1475-7516/2015/06/050
http://cds.cern.ch/record/2004544
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AT durrerruth dowecareaboutthedistancetothecmbclarifyingtheimpactofsecondorderlensing
AT maartensroy dowecareaboutthedistancetothecmbclarifyingtheimpactofsecondorderlensing
AT umehobinna dowecareaboutthedistancetothecmbclarifyingtheimpactofsecondorderlensing

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