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2018

Fully relativistic treatment of light neutrinos in $N$-body simulations

Tram, Thomas, Brandbyge, Jacob, Dakin, Jeppe et al.

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Cosmological $N$-body simulations are typically purely run with particles using Newtonian equations of motion.

However, such simulations can be made fully consistent with general relativity using a well-defined prescription.
Here, we extend the formalism previously developed for $\Lambda$CDM cosmologies with massless neutrinos to include the effects of massive, but light neutrinos.
We have implemented the method in two different $N$-body codes, CONCEPT and PKDGRAV, and demonstrate that they produce consistent results.

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