Browsing Faculty of Natural and Agricultural Sciences by Subject "Cosmology: observations"

Now showing items 1-2 of 2

    • Age-dating luminous red galaxies observed with the Southern African Large Telescope 

      Ratsimbazafy, A.L.; Loubser, S.I.; Crawford, S.M.; Cress, C.M.; Bassett, B.A.; Vaisanen, P. (Oxford Univ Press, 2017)
      We measure a value for the cosmic expansion of H(z) = 89 ± 23(stat) ± 44(syst) km s−1 Mpc−1 at a redshift of z ≃ 0.47 based on the differential age technique. This technique, also known as cosmic chronometers, uses the age ...

    • The void galaxy survey: photometry, structure and identity of void galaxies 

      Beygu, B.; Peletier, R.F.; Van der Hulst, J.M.; Jarrett, T.H.; Kreckel, K. (Oxford Univ Press, 2017)
      We analyse photometry from deep B-band images of 59 void galaxies in the Void Galaxy Survey (VGS), together with their near-infrared 3.6 μm and 4.5 μm Spitzer photometry. The VGS galaxies constitute a sample of void galaxies ...