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Title: How real-time cosmology can distinguish between different anisotropic models

Abstract

We present a new analysis on how to distinguish between isotropic and anisotropic cosmological models based on tracking the angular displacements of a large number of distant quasars over an extended period of time, and then performing a multipole-vector decomposition of the resulting displacement maps. We find that while the GAIA mission operating at its nominal specifications does not have sufficient angular resolution to resolve anisotropic universes from isotropic ones using this method within a reasonable timespan of ten years, a next-generation GAIA-like survey with a resolution ten times better should be equal to the task. Distinguishing between different anisotropic models is however more demanding. Keeping the observational timespan to ten years, we find that the angular resolution of the survey will need to be of order 0.1 μas in order for certain rotating anisotropic models to produce a detectable signature that is also unique to models of this class. However, should such a detection become possible, it would immediately allow us to rule out large local void models.

Authors:
 [1];  [2];  [3]
  1. Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, D–69120 Heidelberg (Germany)
  2. Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK–8000 Aarhus C (Denmark)
  3. Instituut-Lorentz for Theoretical Physics, Universiteit Leiden, Niels Bohrweg 2, 2333 CA Leiden (Netherlands)
Publication Date:
OSTI Identifier:
22369844
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2013; Journal Issue: 12; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANISOTROPY; COSMOLOGICAL MODELS; COSMOLOGY; QUASARS; SPATIAL RESOLUTION; UNIVERSE

Citation Formats

Amendola, Luca, Bjælde, Ole Eggers, Valkenburg, Wessel, and Wong, Yvonne Y.Y., E-mail: l.amendola@thphys.uni-heidelberg.de, E-mail: oeb@phys.au.dk, E-mail: valkenburg@lorentz.leidenuniv.nl, E-mail: yvonne.y.wong@unsw.edu.au. How real-time cosmology can distinguish between different anisotropic models. United States: N. p., 2013. Web. doi:10.1088/1475-7516/2013/12/042.
Amendola, Luca, Bjælde, Ole Eggers, Valkenburg, Wessel, & Wong, Yvonne Y.Y., E-mail: l.amendola@thphys.uni-heidelberg.de, E-mail: oeb@phys.au.dk, E-mail: valkenburg@lorentz.leidenuniv.nl, E-mail: yvonne.y.wong@unsw.edu.au. How real-time cosmology can distinguish between different anisotropic models. United States. https://doi.org/10.1088/1475-7516/2013/12/042
Amendola, Luca, Bjælde, Ole Eggers, Valkenburg, Wessel, and Wong, Yvonne Y.Y., E-mail: l.amendola@thphys.uni-heidelberg.de, E-mail: oeb@phys.au.dk, E-mail: valkenburg@lorentz.leidenuniv.nl, E-mail: yvonne.y.wong@unsw.edu.au. 2013. "How real-time cosmology can distinguish between different anisotropic models". United States. https://doi.org/10.1088/1475-7516/2013/12/042.
@article{osti_22369844,
title = {How real-time cosmology can distinguish between different anisotropic models},
author = {Amendola, Luca and Bjælde, Ole Eggers and Valkenburg, Wessel and Wong, Yvonne Y.Y., E-mail: l.amendola@thphys.uni-heidelberg.de, E-mail: oeb@phys.au.dk, E-mail: valkenburg@lorentz.leidenuniv.nl, E-mail: yvonne.y.wong@unsw.edu.au},
abstractNote = {We present a new analysis on how to distinguish between isotropic and anisotropic cosmological models based on tracking the angular displacements of a large number of distant quasars over an extended period of time, and then performing a multipole-vector decomposition of the resulting displacement maps. We find that while the GAIA mission operating at its nominal specifications does not have sufficient angular resolution to resolve anisotropic universes from isotropic ones using this method within a reasonable timespan of ten years, a next-generation GAIA-like survey with a resolution ten times better should be equal to the task. Distinguishing between different anisotropic models is however more demanding. Keeping the observational timespan to ten years, we find that the angular resolution of the survey will need to be of order 0.1 μas in order for certain rotating anisotropic models to produce a detectable signature that is also unique to models of this class. However, should such a detection become possible, it would immediately allow us to rule out large local void models.},
doi = {10.1088/1475-7516/2013/12/042},
url = {https://www.osti.gov/biblio/22369844}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 12,
volume = 2013,
place = {United States},
year = {Sun Dec 01 00:00:00 EST 2013},
month = {Sun Dec 01 00:00:00 EST 2013}
}