Density profiles of galaxy groups and clusters from SDSS galaxy–galaxy weak lensing

  title={Density profiles of galaxy groups and clusters from SDSS galaxy–galaxy weak lensing},
  author={Rachel Mandelbaum and Uros Seljak and Richard Jacob Cool and Michael R. Blanton and Christopher M. Hirata and Jonathan V. Brinkmann},
  journal={Monthly Notices of the Royal Astronomical Society},
We present results of a measurement of the shape of the density profile of galaxy groups and clusters traced by 43 335 Luminous Red Galaxies (LRGs) with spectroscopic redshifts from the Sloan Digital Sky Survey (SDSS). The galaxies are selected such that they are the brightest within a cylindrical aperture, split into two luminosity samples and modelled as the sum of stellar and dark matter components. We present a detailed investigation of many possible systematic effects that could… 
Cosmological parameter constraints from galaxy-galaxy lensing and galaxy clustering with the SDSS DR7
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