Nonlinear evolution of initially biased tracers in modified gravity

Understand

In this work we extend the perturbation theory for modified gravity (MG) in two main aspects.

• First, the construction of matter overdensities from Lagrangian displacement fields is shown to hold in a general framework, allowing us to find Standard Perturbation Theory (SPT) kernels from known Lagrangian Perturbation Theory (LPT) kernels.
• We then develop a theory of biased tracers for generalized cosmologies, extending already existing formalisms for $\Lambda$CDM.
• We present the correlation function in Convolution-LPT and the power spectrum in SPT for $\Lambda$CDM, $f(R)$ Hu-Sawicky, and DGP braneworld models.