Local Void vs Dark Energy: Confrontation with WMAP and Type Ia Supernovae

It is now a known fact that if we happen to be living in the middle of a large underdense region, then we will observe an ``apparent acceleration'', even when any form of dark energy is absent. In this paper, we present a ``Minimal Void'' scenario, i.e. a ``void'' with...

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Detalles Bibliográficos
Autores principales: Alexander, Stephon, Biswas, Tirthabir, Notari, Alessio, Vaid, Deepak
Lenguaje:eng
Publicado: 2007
Materias:
Astrophysics and Astronomy
Acceso en línea:https://dx.doi.org/10.1088/1475-7516/2009/09/025
http://cds.cern.ch/record/1073098
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author Alexander, Stephon
Biswas, Tirthabir
Notari, Alessio
Vaid, Deepak
author_facet Alexander, Stephon
Biswas, Tirthabir
Notari, Alessio
Vaid, Deepak
author_sort Alexander, Stephon
collection CERN
description It is now a known fact that if we happen to be living in the middle of a large underdense region, then we will observe an ``apparent acceleration'', even when any form of dark energy is absent. In this paper, we present a ``Minimal Void'' scenario, i.e. a ``void'' with minimal underdensity contrast (of about -0.4) and radius (~ 200-250 Mpc/h) that can, not only be consistent with the supernovae data, but also with the 3-yr WMAP data. We also discuss consistency of our model with various other measurements such as Big Bang Nucleosynthesis, Baryon Acoustic Oscillations and local measurements of the Hubble parameter. We also point out possible other observable signatures.
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institution Organización Europea para la Investigación Nuclear
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spelling cern-10730982023-03-12T04:33:33Zdoi:10.1088/1475-7516/2009/09/025http://cds.cern.ch/record/1073098engAlexander, StephonBiswas, TirthabirNotari, AlessioVaid, DeepakLocal Void vs Dark Energy: Confrontation with WMAP and Type Ia SupernovaeAstrophysics and AstronomyIt is now a known fact that if we happen to be living in the middle of a large underdense region, then we will observe an ``apparent acceleration'', even when any form of dark energy is absent. In this paper, we present a ``Minimal Void'' scenario, i.e. a ``void'' with minimal underdensity contrast (of about -0.4) and radius (~ 200-250 Mpc/h) that can, not only be consistent with the supernovae data, but also with the 3-yr WMAP data. We also discuss consistency of our model with various other measurements such as Big Bang Nucleosynthesis, Baryon Acoustic Oscillations and local measurements of the Hubble parameter. We also point out possible other observable signatures.It is now a known fact that if we happen to be living in the middle of a large underdense region, then we will observe an ``apparent acceleration'', even when any form of dark energy is absent. In this paper, we present a ``Minimal Void'' scenario, i.e. a ``void'' with minimal underdensity contrast (of about -0.4) and radius (~ 200-250 Mpc/h) that can, not only explain the supernovae data, but also be consistent with the 3-yr WMAP data. We also discuss consistency of our model with various other measurements such as Big Bang Nucleosynthesis, Baryon Acoustic Oscillations and local measurements of the Hubble parameter, and also point out possible observable signatures.arXiv:0712.0370IGPG-07-2-1oai:cds.cern.ch:10730982007-12-04
spellingShingle Astrophysics and Astronomy
Alexander, Stephon
Biswas, Tirthabir
Notari, Alessio
Vaid, Deepak
Local Void vs Dark Energy: Confrontation with WMAP and Type Ia Supernovae
title Local Void vs Dark Energy: Confrontation with WMAP and Type Ia Supernovae
title_full Local Void vs Dark Energy: Confrontation with WMAP and Type Ia Supernovae
title_fullStr Local Void vs Dark Energy: Confrontation with WMAP and Type Ia Supernovae
title_full_unstemmed Local Void vs Dark Energy: Confrontation with WMAP and Type Ia Supernovae
title_short Local Void vs Dark Energy: Confrontation with WMAP and Type Ia Supernovae
title_sort local void vs dark energy: confrontation with wmap and type ia supernovae
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1088/1475-7516/2009/09/025
http://cds.cern.ch/record/1073098
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AT biswastirthabir localvoidvsdarkenergyconfrontationwithwmapandtypeiasupernovae
AT notarialessio localvoidvsdarkenergyconfrontationwithwmapandtypeiasupernovae
AT vaiddeepak localvoidvsdarkenergyconfrontationwithwmapandtypeiasupernovae

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