Now showing items 1-7 of 7

  • Cosmology with next generation radio telescopes 

    Witzemann, Amadeus (University of the Western Cape, 2019)
    The next generation of radio telescopes will revolutionize cosmology by providing large three-dimensional surveys of the universe. This work presents forecasts using the technique 21cm intensity mapping (IM) combined ...
  • The curious case of offset bars : markers for a baby galaxy disk or signposts of an interaction with dark matter sub halos? 

    Fortune, Marc Harris Yao (University of the Western Cape, 2016)
    We have used the Spitzer Survey of Stellar Structure in Galaxies (S⁴G) as a representative sample of the local universe (total of 2352 galaxies in S⁴G) to make a catalog of offset disk barred galaxies. Using the combined ...
  • The effects of environment on radio-loud AGN activity in Stripe 82 

    Kolwa, Sthabile (University of the Western Cape, 2016)
    We investigate the link between environment and radiative accretion efficiency using a sample of 8946 radio-loud AGN detected at 1 − 2 GHz in the SDSS Stripe 82 region. We quantify their environments using the surface-density ...
  • Luminous red galaxies in simulations 

    Ratsimbazafy, Ando Lalaina (2010)
    There have been a number of attempts to measure the expansion rate of the Universe using age-dating of Luminous Red Galaxies (LRGs).Assuming stars in LRGs form at the same time, age-dating of two populations of LRGs at ...
  • The nature of the microjy source population 

    Ocran Emmanuel Francis (University of the Western Cape, 2015)
    The study of the faint radio universe and of its properties has recently become a very active field of research not only because of the much improved capabilities of the SKA pathfinders but also because of the need to ...
  • Stellar masses of star forming galaxies in clusters 

    Randriamampandry, Solohery Mampionona (University of the Western Cape, 2010)
    We determine the stellar mass of star forming galaxies in the X-ray luminous cluster MS 0451.6-0305 at z ∼ 0.54. The stellar masses are estimated from fitting model spectral energy distributions (SEDs) to deep, optical ...
  • A study of the angular momentum content of early-type galaxies 

    Tshiwawa, Unarine (University of the Western Cape, 2019)