2007

The Evolution of Bias - Generalized

Hui, Lam, Parfrey, Kyle P.

Understand

Fry (1996) showed that galaxy bias has the tendency to evolve towards unity, i.e.

  • in the long run, the galaxy distribution tends to trace that of matter.
  • Generalizing slightly Fry's reasoning, we show that his conclusion remains valid in theories of modified gravity (or equivalently, complex clustered dark energy).
  • This is not surprising: as long as both galaxies and matter are subject to the same force, dynamics would drive them towards tracing each other.

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