Cosmology with large-scale structure and galaxy flows

Morag Scrimgeour

    Research output: ThesisDoctoral Thesis

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    Abstract

    [Truncated abstract] Understanding the large-scale structure of the Universe is a crucial test of the standard model of cosmology, Lambda Cold Dark Matter (ΛCDM). This thesis presents two different tests of the properties of large-scale structure, to test assumptions and predictions of ΛCDM.
    The first is a test of the large-scale homogeneity of the Universe, a key assumption of ΛCDM that allows the Friedmann-Robertson-Walker (FRW) metric to be used as the description of space-time. Many aspects of ΛCDM directly rely on the assumption that the large-scale Universe is homogeneous and isotropic, including the postulation of dark energy as the cause of the observed cosmic acceleration, and the use of statistical measurements such as the power spectrum to constrain properties of the Universe. Although the isotropy of the cosmic microwave background (CMB) at z ∼ 1100 provides good evidence for
    homogeneity, it is crucial the assumption be robustly tested at low-redshift using a 3D measurement.
    Original languageEnglish
    QualificationDoctor of Philosophy
    Publication statusUnpublished - 2013

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