Lawrence Berkeley National Laboratory
Hi-class: Horndeski in the Cosmic Linear Anisotropy Solving System
- Author(s): Zumalacárregui, M
- Bellini, E
- Sawicki, I
- Lesgourgues, J
- Ferreira, PG
- et al.
Published Web Locationhttps://doi.org/10.1088/1475-7516/2017/08/019
© 2017 IOP Publishing Ltd and Sissa Medialab. We present the public version of hi-class (www.hiclass-code.net), an extension of the Boltzmann code CLASS to a broad ensemble of modifications to general relativity. In particular, hi-class can calculate predictions for models based on Horndeski's theory, which is the most general scalar-tensor theory described by second-order equations of motion and encompasses any perfect-fluid dark energy, quintessence, Brans-Dicke, f(R) and covariant Galileon models. hi-class has been thoroughly tested and can be readily used to understand the impact of alternative theories of gravity on linear structure formation as well as for cosmological parameter extraction.