Age-dating Luminous Red Galaxies observed with the Southern African Large Telescope

A. L. Ratsimbazafy, S. I. Loubser, S. M. Crawford +4

We measure a value for the cosmic expansion of $H(z)=89\pm 23$(stat) $\pm$ 44(syst) km s${}^{-1}$ Mpc${}^{-1}$ at a redshift of $z\simeq 0.47$ based on the differential age techniq…