Now showing items 1-5 of 5

  • Measuring the quasar luminosity function below the detection threshold 

    Malefahlo, Eliab (University of the Western Cape, 2016)
    The radio emission of radio-quiet active galactic nuclei (AGN) is thought to be from star formation and AGN related emission. I investigate these sources using 1.4 GHz radio data from FIRST and three optical quasars samples ...
  • Modelling the growth of large-scale structure with interacting fluids 

    Onchong’a, Okeng’o Geoffrey (University of the Western Cape, 2015)
    Prevailing astronomical and astrophysical observations suggest that we live in a spatially flat cold dark matter (CDM) universe - currently going through a period of accelerated expansion possibly driven by “dark energy” ...
  • Perturbations of dark energy models 

    Elmufti, Mohammed (University of Western Cape, 2012)
    The growth of structure in the Universe proceeds via the collapse of dark matter and baryons. This process is retarded by dark energy which drives an accelerated expansion of the late Universe. In this thesis we use ...
  • Redshift-space distortions as a probe of dark energy 

    Gouws, Liesbeth-Helena (University of Western Cape, 2014)
    We begin by finding a system of differential equations for the background and linearly perturbed variables in the standard, ɅCDM model, using the Einstein Field Equations, and then solving these numerically. Later, we ...
  • Relativistic corrections to the power spectrum 

    Duniya, Didam Gwazah Adams (University of the Western Cape, 2015)
    The matter power spectrum is key to understanding the growth of large-scale structure in the Universe. Upcoming surveys of galaxies in the optical and HI will probe increasingly large scales, approaching and even exceeding ...