PT Journal
AU Bellomo, N
   Bellini, E
   Hu, B
   Jimenez, R
   Pena-Garay, C
   Verde, L
TI Hiding neutrino mass in modified gravity cosmologies
SO Journal of Cosmology and Astroparticle Physics
JI J. Cosmol. Astropart. Phys.
PY 2017
BP 043
EP 12pp
VL 02
IS 2
DI 10.1088/1475-7516/2017/02/043
LA English
DE cosmological neutrinos; modified gravity; neutrino astronomy; neutrino masses from cosmology
AB Cosmological observables show a dependence with the neutrino mass, which is partially degenerate with parameters of extended models of gravity. We study and explore this degeneracy in Horndeski generalized scalar-tensor theories of gravity. Using forecasted cosmic microwave background and galaxy power spectrum datasets, we find that a single parameter in the linear regime of the effective theory dominates the correlation with the total neutrino mass. For any given mass, a particular value of this parameter approximately cancels the power suppression due to the neutrino mass at a given redshift. The extent of the cancellation of this degeneracy depends on the cosmological large-scale structure data used at different redshifts. We constrain the parameters and functions of the effective gravity theory and determine the influence of gravity on the determination of the neutrino mass from present and future surveys.
ER