Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 8, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2017/08/006
Keywords
cosmological simulations; modified gravity
Funding
- STFC [1825588, ST/P000673/1, ST/N000668/1, ST/M007065/1, ST/L000636/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/P000673/1, ST/L000636/1, 1825588, ST/N000668/1, ST/M007065/1] Funding Source: researchfish
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We present a general parallelized and easy-to-use code to perform numerical simulations of structure formation using the COLA (COmoving Lagrangian Acceleration) method for cosmological models that exhibit scale-dependent growth at the level of first and second order Lagrangian perturbation theory. For modified gravity theories we also include screening using a fast approximate method that covers all the main examples of screening mechanisms in the literature. We test the code by comparing it to full simulations of two popular modified gravity models, namely f(R) gravity and nDGP, and find good agreement in the modified gravity boost-factors relative to ACDM even when using a fairly small number of COLA time steps.
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