Is there enough star formation in simulated protoclusters?

  title={Is there enough star formation in simulated protoclusters?},
  author={Seunghwan Lim and Douglas Scott and Arif Babul and David J Barnes and Scott T Kay and Ian G. McCarthy and Douglas Rennehan and Mark Vogelsberger},
  journal={Monthly Notices of the Royal Astronomical Society},
As progenitors of the most massive objects, protoclusters are key to tracing the evolution and star formation history of the Universe, and are responsible for ${\gtrsim }\, 20$ per cent of the cosmic star formation at $z\, {\gt }\, 2$. Using a combination of state-of-the-art hydrodynamical simulations and empirical models, we show that current galaxy formation models do not produce enough star formation in protoclusters to match observations. We find that the star formation rates (SFRs… 
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