A Stringent Upper Limit on Dark Matter Self-Interaction Cross Section from Cluster Strong Lensing

  title={A Stringent Upper Limit on Dark Matter Self-Interaction Cross Section from Cluster Strong Lensing},
  author={Kevin E. Andrade and John H. Fuson and Sophia Gad-Nasr and Derui Kong and Quinn Minor and M. Grant Roberts and Manoj Kaplinghat},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
We analyze strongly lensed images in 8 galaxy clusters to measure their dark matter density profiles in the radial region between 10 kpc and 100 kpc, and use this to constrain the self-interaction cross section of dark matter (DM) particles. We infer the mass profiles of the central DM halos, bright central galaxies, key member galaxies, and DM subhalos for the member galaxies for all 8 clusters using the QLens code. The inferred DM halo surface densities are fit to a self-interacting dark… 
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