Library Portal | UWC Portal | National ETDs | Global ETDs
    • Login
    Contact Us | About Us | FAQs | Login
    View Item 
    •   DSpace Home
    • Faculty of Natural Sciences
    • Physics and Astronomy
    • Research Articles (Physics)
    • View Item
    •   DSpace Home
    • Faculty of Natural Sciences
    • Physics and Astronomy
    • Research Articles (Physics)
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Hybrid P` (k): General, unified, non-linear matter power spectrum in redshift space

    Thumbnail
    View/Open
    Bose_2020_J._Cosmol._Astropart._Phys._2020_001.pdf (1.366Mb)
    Date
    2020
    Author
    Pourtsidou, Alkistis
    Bose, Benjamin
    Winther, Hans A.
    Metadata
    Show full item record
    Abstract
    Constraints on gravity and cosmology will greatly benefit from performing joint clustering and weak lensing analyses on large-scale structure data sets. Utilising non-linear information coming from small physical scales can greatly enhance these constraints. At the heart of these analyses is the matter power spectrum. Here we employ a simple method, dubbed “Hybrid P`(k)”, based on the Gaussian Streaming Model (GSM), to calculate the quasi non-linear redshift space matter power spectrum multipoles. This employs a fully nonlinear and theoretically general prescription for the matter power spectrum. We test this approach against comoving Lagrangian acceleration simulation measurements performed in GR, DGP and f(R) gravity and find that our method performs comparably or better to the dark matter TNS redshift space power spectrum model for dark matter. When comparing the redshift space multipoles for halos, we find that the Gaussian approximation of the GSM with a linear bias and a free stochastic term, N, is competitive to the TNS model. Our approach offers many avenues for improvement in accuracy as well as further unification under the halo model.
    URI
    10.1088/1475-7516/2020/09/001
    http://hdl.handle.net/10566/5940
    Collections
    • Research Articles (Physics)

    DSpace 6.3 | Ubuntu | Copyright © University of the Western Cape
    Contact Us | Send Feedback
    Theme by 
    Atmire NV
     

     

    Browse

    All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    Login

    Statistics

    View Usage Statistics

    DSpace 6.3 | Ubuntu | Copyright © University of the Western Cape
    Contact Us | Send Feedback
    Theme by 
    Atmire NV