Intrinsic alignments of galaxies in the Horizon-AGN cosmological hydrodynamical simulation

@article{Chisari2015IntrinsicAO,
  title={Intrinsic alignments of galaxies in the Horizon-AGN cosmological hydrodynamical simulation},
  author={N. E. Chisari and S. Codis and C. Laigle and Y. Dubois and C. Pichon and J. Devriendt and A. Slyz and L. Miller and R. Gavazzi and K. Benabed},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2015},
  volume={454},
  pages={2736-2753}
}
The intrinsic alignments of galaxies are recognised as a contaminant to weak gravitational lensing measurements. In this work, we study the alignment of galaxy shapes and spins at low redshift ($z\sim 0.5$) in Horizon-AGN, an adaptive-mesh-refinement hydrodynamical cosmological simulation box of 100 Mpc/h a side with AGN feedback implementation. We find that spheroidal galaxies in the simulation show a tendency to be aligned radially towards over-densities in the dark matter density field and… Expand
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