Probing satellite haloes with weak gravitational lensing

Bryan R. Gillis, Michael J. Hudson, Stefan Hilbert, Jan Hartlap

Research output: Contribution to journalArticlepeer-review


We demonstrate the possibility of detecting tidal stripping of dark matter subhaloes within galaxy groups using weak gravitational lensing. We have run ray-tracing simulations on galaxy catalogues from the Millennium Simulation to generate mock shape catalogues. The ray-tracing cataloguesassume a halo model for galaxies and groups using various models with different distributions of mass between galaxy and group haloes to simulate different stages of group evolution. Using these mock catalogues, we forecast the lensing signals that will be detected around galaxy groups and satellite galaxies, as well as test two different methods for isolating the satellites' lensing signals. A key challenge is to determine the accuracy to which group centres can be identified. We showthat with current and ongoing surveys, it will possible to detect stripping in groups of mass 1012-1015M

Original languageEnglish
Pages (from-to)372-384
Number of pages13
JournalMonthly Notices of the Royal Astronomical Society
Issue number1
Publication statusPublished - 2013


  • Clusters
  • galaxies
  • General - galaxies
  • General - gravitational lensing
  • Groups
  • Weak - dark matter

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