Constraints on the velocity profiles of galaxies from strong lensing statistics and semi-analytical modelling of galaxy formation

  title={Constraints on the velocity profiles of galaxies from strong lensing statistics and semi-analytical modelling of galaxy formation},
  author={Kyu-Hyun Chae and Shude Mao and Xi Kang},
  journal={Monthly Notices of the Royal Astronomical Society},
  • K. Chae, S. Mao, X. Kang
  • Published 17 May 2006
  • Physics
  • Monthly Notices of the Royal Astronomical Society
Semi-analytical models of galaxy formation can be used to predict the evolution of the number density of early-type galaxies as a function of the circular velocity at the virial radius, ν c,vir . Gravitational lensing probability and separation distribution on the other hand are sensitive to the velocity dispersion (or circular velocity) at about the effective radius. We adopt the singular isothermal ellipsoid (SIE) lens model to estimate the velocity dispersion at the effective radius. The… 

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