TY  - JOUR
AU  - Bellomo, N.
AU  - Bellini, E.
AU  - Hu, B.
AU  - Jimenez, R.
AU  - Pena-Garay, C.
AU  - Verde, L.
PY  - 2017
DA  - 2017//
TI  - Hiding neutrino mass in modified gravity cosmologies
T2  - J. Cosmol. Astropart. Phys.
JO  - Journal of Cosmology and Astroparticle Physics
SP  - 043
EP  - 12pp
VL  - 02
IS  - 2
PB  - Iop Publishing Ltd
KW  - cosmological neutrinos
KW  - modified gravity
KW  - neutrino astronomy
KW  - 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.
SN  - 1475-7516
UR  - http://arxiv.org/abs/1612.02598
UR  - https://doi.org/10.1088/1475-7516/2017/02/043
DO  - 10.1088/1475-7516/2017/02/043
LA  - English
N1  - WOS:000399455000043
ID  - Bellomo_etal2017
ER  -