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[ascl:2311.009] Hi-COLA: Cosmological large-scale structure simulator for Horndeski theories

Hi-COLA runs fast approximate N-body simulations of non-linear structure formation in reduced Horndeski gravity (Horndeski theories with luminal gravitational waves). It is generic with respect to the reduced Horndeski class. Given an input Lagrangian, Hi-COLA's front-end dynamically constructs the appropriate field equations and consistently solves for the cosmological background, linear growth, and screened fifth force of that theory. This is passed to the back-end, which runs a hybrid N-body simulation at significantly reduced computational and temporal cost compared to traditional N-body codes. By analyzing the particle snapshots, one can study the formation of structure through statistics such as the matter power spectrum.

Code site:
https://github.com/Hi-COLACode/Hi-COLA
Described in:
https://ui.adsabs.harvard.edu/abs/2023JCAP...03..040W
Bibcode:
2023ascl.soft11009W

Views: 274

ascl:2311.009
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