Can extragalactic foregrounds explain the large-angle CMB anomalies?

We address the effect of an extended local foreground on the low-l anomalies found in the CMB. Recent X-ray catalogues point us to the existence of very massive superstructures at the 100 h^(-1) Mpc scale that contribute significantly to the dipole velocity profile. Being highly non-linear, these st...

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Detalles Bibliográficos
Autores principales: Rakic, Aleksandar, Rasanen, Syksy, Schwarz, Dominik J.
Lenguaje:eng
Publicado: 2006
Materias:
Astrophysics and Astronomy
Acceso en línea:https://dx.doi.org/10.1142/9789812834300_0219
http://cds.cern.ch/record/982590
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author Rakic, Aleksandar
Rasanen, Syksy
Schwarz, Dominik J.
author_facet Rakic, Aleksandar
Rasanen, Syksy
Schwarz, Dominik J.
author_sort Rakic, Aleksandar
collection CERN
description We address the effect of an extended local foreground on the low-l anomalies found in the CMB. Recent X-ray catalogues point us to the existence of very massive superstructures at the 100 h^(-1) Mpc scale that contribute significantly to the dipole velocity profile. Being highly non-linear, these structures provide us a natural candidate to leave an imprint on the CMB sky via a local Rees-Sciama effect. We show that the Rees-Sciama effect of local foregrounds can induce CMB anisotropy of DeltaT/T ~ 10^(-5) and we analyse its impact on multipole power as well as the induced phase pattern on largest angular scales.
id cern-982590
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2006
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spelling cern-9825902023-03-14T18:14:53Zdoi:10.1142/9789812834300_0219http://cds.cern.ch/record/982590engRakic, AleksandarRasanen, SyksySchwarz, Dominik J.Can extragalactic foregrounds explain the large-angle CMB anomalies?Astrophysics and AstronomyWe address the effect of an extended local foreground on the low-l anomalies found in the CMB. Recent X-ray catalogues point us to the existence of very massive superstructures at the 100 h^(-1) Mpc scale that contribute significantly to the dipole velocity profile. Being highly non-linear, these structures provide us a natural candidate to leave an imprint on the CMB sky via a local Rees-Sciama effect. We show that the Rees-Sciama effect of local foregrounds can induce CMB anisotropy of DeltaT/T ~ 10^(-5) and we analyse its impact on multipole power as well as the induced phase pattern on largest angular scales.We address the effect of an extended local foreground on the low-l anomalies found in the CMB. Recent X-ray catalogues point us to the existence of very massive superstructures at the 100 h^(-1) Mpc scale that contribute significantly to the dipole velocity profile. Being highly non-linear, these structures provide us a natural candidate to leave an imprint on the CMB sky via a local Rees-Sciama effect. We show that the Rees-Sciama effect of local foregrounds can induce CMB anisotropy of DeltaT/T ~ 10^(-5) and we analyse its impact on multipole power as well as the induced phase pattern on largest angular scales.astro-ph/0609188BI-TP-2006-33BI-TP-2006-33CERN-PH-TH-2006-178oai:cds.cern.ch:9825902006-09-07
spellingShingle Astrophysics and Astronomy
Rakic, Aleksandar
Rasanen, Syksy
Schwarz, Dominik J.
Can extragalactic foregrounds explain the large-angle CMB anomalies?
title Can extragalactic foregrounds explain the large-angle CMB anomalies?
title_full Can extragalactic foregrounds explain the large-angle CMB anomalies?
title_fullStr Can extragalactic foregrounds explain the large-angle CMB anomalies?
title_full_unstemmed Can extragalactic foregrounds explain the large-angle CMB anomalies?
title_short Can extragalactic foregrounds explain the large-angle CMB anomalies?
title_sort can extragalactic foregrounds explain the large-angle cmb anomalies?
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1142/9789812834300_0219
http://cds.cern.ch/record/982590
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AT rasanensyksy canextragalacticforegroundsexplainthelargeanglecmbanomalies
AT schwarzdominikj canextragalacticforegroundsexplainthelargeanglecmbanomalies

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