Lensing by Distant Clusters: HST Observations of Weak Shear in the Field of 3C 324*

  title={Lensing by Distant Clusters: HST Observations of Weak Shear in the Field of 3C 324*},
  author={I. S. Dickinson},
  journal={The Astrophysical Journal},
We present the detection of weak gravitational lensing in the field of the radio galaxy 3C 324 (z = 1.206) using deep HST imaging. From an analysis of the shapes of faint R = 24.5-27.5 galaxies in the field we measure a weak, coherent distortion centered close to the radio source. This shear field most likely arises from gravitational lensing of distant field galaxies by a foreground mass concentration. In the light of previous observations of this region, which indicate the presence of a rich… Expand
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