Hiding neutrino mass in modified gravity cosmologies
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 pow...
| Main Authors: | , , , , , |
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| Format: | Journal article |
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Institute of Physics
2017
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| _version_ | 1826260715452760064 |
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| author | Bellomo, N Bellini, E Hu, B Jimenez, R Pena-Garay, C Verde, L |
| author_facet | Bellomo, N Bellini, E Hu, B Jimenez, R Pena-Garay, C Verde, L |
| author_sort | Bellomo, N |
| collection | OXFORD |
| description | 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. |
| first_indexed | 2024-03-06T19:10:05Z |
| format | Journal article |
| id | oxford-uuid:1676aad5-88c9-48d2-bac4-18769aa11186 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T19:10:05Z |
| publishDate | 2017 |
| publisher | Institute of Physics |
| record_format | dspace |
| spelling | oxford-uuid:1676aad5-88c9-48d2-bac4-18769aa111862022-03-26T10:31:32ZHiding neutrino mass in modified gravity cosmologiesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:1676aad5-88c9-48d2-bac4-18769aa11186Symplectic Elements at OxfordInstitute of Physics2017Bellomo, NBellini, EHu, BJimenez, RPena-Garay, CVerde, LCosmological 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. |
| spellingShingle | Bellomo, N Bellini, E Hu, B Jimenez, R Pena-Garay, C Verde, L Hiding neutrino mass in modified gravity cosmologies |
| title | Hiding neutrino mass in modified gravity cosmologies |
| title_full | Hiding neutrino mass in modified gravity cosmologies |
| title_fullStr | Hiding neutrino mass in modified gravity cosmologies |
| title_full_unstemmed | Hiding neutrino mass in modified gravity cosmologies |
| title_short | Hiding neutrino mass in modified gravity cosmologies |
| title_sort | hiding neutrino mass in modified gravity cosmologies |
| work_keys_str_mv | AT bellomon hidingneutrinomassinmodifiedgravitycosmologies AT bellinie hidingneutrinomassinmodifiedgravitycosmologies AT hub hidingneutrinomassinmodifiedgravitycosmologies AT jimenezr hidingneutrinomassinmodifiedgravitycosmologies AT penagarayc hidingneutrinomassinmodifiedgravitycosmologies AT verdel hidingneutrinomassinmodifiedgravitycosmologies |