Prof Claude Carignan

Neutral hydrogen, cosmic web and dark matter in nearby galaxies


Neutral hydrogen (HI) is the ideal probe to study dark matter in individual galaxies since it can probe the gravitational potential to larger radii than the stars. The new radio telescopes being built in South Africa (KAT-7, MeerKAT and the SKA) will allow us to detect much fainter HI and hence to get a better handle on the elusive dark matter component and hopefully connect the galaxies to the cosmic web. Already, our group is very active in many projects, which are underway on the precursor KAT-7 telescope and is getting ready for the SKA pathfinder MeerKAT (image from Wolfe et al. 2013, Nature, 497, 224).

SARChI Postdoctoral fellows:

  • Dr Yannick Liebert: Teaching Radio Interferometer
  • Dr Nathan Deg: Numerical Simulations
  • Dr Spencer Wolfe: Low Column Density HI

Postgraduate students:

  • Moses Mogotsi, PhD: Star Formation and Dynamics of Nearby Galaxies (co-supervision with G. Meurer, ICRAR & W.J.G. de Blok, ASTRON)
  • Toky Randriamampandry, PhD: Correcting the rotation curves of spiral galaxies for the non-circular motions induced by bars
  • Marie Korsaga, PhD: Mass modelling of the Galaxies in the Ha Fabry-Perot sample GHASP (co-supervision with P. Amram, LAM, Marseille)
  • Brenda Namumba, PhD: Survey of Southern Local Group Dwarfs with KAT-7 (co-supervision with Sean Passmoor, SKA SA)
  • Amidou Sorgho, PhD: Characterisation of the HI content of the MHONGOOSE galaxy sample with KAT-7
  • Blaise Tapsoba, PhD: High resolution SALT Fabry-Perot observations of MHONGOOSE galaxies (co-supervision with Ted Williams, SAAO)

Selected recent papers: