• Login
    JavaScript is disabled for your browser. Some features of this site may not work without it.
    Archipelagian Cosmology: Dynamics and Observables in a Universe with Discretized Matter Content 
    •   QMRO Home
    • School of Physics and Astronomy
    • Astronomy and Astrophysics
    • Archipelagian Cosmology: Dynamics and Observables in a Universe with Discretized Matter Content
    •   QMRO Home
    • School of Physics and Astronomy
    • Astronomy and Astrophysics
    • Archipelagian Cosmology: Dynamics and Observables in a Universe with Discretized Matter Content
    ‌
    ‌

    Browse

    All of QMROCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects
    ‌
    ‌

    Administrators only

    Login
    ‌
    ‌

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Archipelagian Cosmology: Dynamics and Observables in a Universe with Discretized Matter Content

    View/Open
    Published version (520.8Kb)
    Volume
    80
    Publisher URL
    http://dx.doi.org/10.1103/PhysRevD.80.103503
    DOI
    10.1103/PhysRevD.80.103503
    Journal
    Phys.Rev.D80:103503,2009; Phys.Rev.D84:109902,2011
    Issue
    10
    ISSN
    1550-7998
    Metadata
    Show full item record
    Abstract
    We consider a model of the Universe in which the matter content is in the form of discrete islands, rather than a continuous fluid. In the appropriate limits the resulting large-scale dynamics approach those of a Friedmann-Robertson-Walker (FRW) universe. The optical properties of such a space-time, however, do not. This illustrates the fact that the optical and `average' dynamical properties of a relativistic universe are not equivalent, and do not specify each other uniquely. We find the angular diameter distance, luminosity distance and redshifts that would be measured by observers in these space-times, using both analytic approximations and numerical simulations. While different from their counterparts in FRW, the effects found do not look like promising candidates to explain the observations usually attributed to the existence of Dark Energy. This incongruity with standard FRW cosmology is not due to the existence of any unexpectedly large structures or voids in the Universe, but only to the fact that the matter content of the Universe is not a continuous fluid.
    Authors
    Clifton, T; Ferreira, PG
    URI
    http://qmro.qmul.ac.uk/xmlui/handle/123456789/17843
    Collections
    • Astronomy and Astrophysics [160]
    Licence information
    This is a pre-copyedited, author-produced PDF of an article accepted for publication in Physical Review D following peer review. The version of record is available http://journals.aps.org/prd/abstract/10.1103/PhysRevD.80.103503
    Copyright statements
    © 2009 American Physical Society
    Twitter iconFollow QMUL on Twitter
    Twitter iconFollow QM Research
    Online on twitter
    Facebook iconLike us on Facebook
    • Site Map
    • Privacy and cookies
    • Disclaimer
    • Accessibility
    • Contacts
    • Intranet
    • Current students

    Modern Slavery Statement

    Queen Mary University of London
    Mile End Road
    London E1 4NS
    Tel: +44 (0)20 7882 5555

    © Queen Mary University of London.