Marginalized Fisher Forecast for Horndeski Dark Energy Models
Cosmology and Nongalactic Astrophysics2017-02-08v2General Relativity and Quantum CosmologyHigh Energy Physics - PhenomenologyHigh Energy Physics - Theory
We use effective field theory (EFT) formalism to forecast the constraint on Horndeski class of dark energy models with future supernova and galaxy surveys. Previously (Gleyzes {\it et al.}) computed unmarginalized constraints (68\% CL error ∼10−3--10−2) on EFT dark energy parameters by fixing all other parameters. We extend the previous work by allowing all cosmological parameters and nuisance parameters to vary and marginalizing over them. We find that (i) the constraints on EFT dark energy parameters are typically worsen by a factor of few after marginalization, and (ii) the constraint on the dark energy equation of state w is not significantly affected by the inclusion of EFT dark energy parameters.
@article{arxiv.1604.07330,
title = {Marginalized Fisher Forecast for Horndeski Dark Energy Models},
author = {Jason S. -Y. Leung and Zhiqi Huang},
journal= {arXiv preprint arXiv:1604.07330},
year = {2017}
}