A Dark Core in Abell 520
@article{Mahdavi2007ADC,
title={A Dark Core in Abell 520},
author={A. Mahdavi and H. Hoekstra and A. Babul and D. Balam and P. Capak},
journal={The Astrophysical Journal},
year={2007},
volume={668},
pages={806-814}
}The rich cluster Abell 520 (z = 0.201) exhibits truly extreme and puzzling multiwavelength characteristics. It may best be described as a "cosmic train wreck." It is a major merger showing abundant evidence for ram pressure stripping, with a clear offset in the gas distribution compared to the galaxies (as in the Bullet Cluster, 1E 0657-558). However, the most striking feature is a massive dark core (721 h70 M☉/L☉B) in our weak-lensing mass reconstruction. The core coincides with the central X… CONTINUE READING
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