Neutrino masses and beyond-ΛCDM cosmology with LSST and future CMB experiments
Cosmological measurements over the next decade will enable us to shed light on the content and evolution of the Universe. Complementary measurements of the cosmic microwave background (CMB) and baryon acoustic oscillations are expected to allow an indirect determination of the sum of neutrino masses...
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| Format: | Journal article |
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American Physical Society
2018
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| _version_ | 1797062785521156096 |
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| author | Mishra-Sharma, S Alonso, D Dunkley, J |
| author_facet | Mishra-Sharma, S Alonso, D Dunkley, J |
| author_sort | Mishra-Sharma, S |
| collection | OXFORD |
| description | Cosmological measurements over the next decade will enable us to shed light on the content and evolution of the Universe. Complementary measurements of the cosmic microwave background (CMB) and baryon acoustic oscillations are expected to allow an indirect determination of the sum of neutrino masses, within the framework of the flat ΛCDM model. However, possible deviations from ΛCDM such as a nonzero cosmological curvature or a dark energy equation of state with w ≠ −1 would leave similar imprints on the expansion rate of the Universe and clustering of matter. We show how future CMB measurements can be combined with late-time measurements of galaxy clustering and cosmic shear from the Large Synoptic Survey Telescope to alleviate this degeneracy. Together, they are projected to reduce the uncertainty on the neutrino mass sum to 30 meV within this more general cosmological model. Achieving a 3σ measurement of the minimal 60 meV mass sum (or 4σ assuming w ¼ −1) will require a fivefold improved measurement of the optical depth to reionization, obtainable through a large-scale CMB polarization measurement. |
| first_indexed | 2024-03-06T20:50:32Z |
| format | Journal article |
| id | oxford-uuid:376957fb-dfeb-469b-a4b2-abc6b8b7b84c |
| institution | University of Oxford |
| last_indexed | 2024-03-06T20:50:32Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:376957fb-dfeb-469b-a4b2-abc6b8b7b84c2022-03-26T13:43:54ZNeutrino masses and beyond-ΛCDM cosmology with LSST and future CMB experimentsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:376957fb-dfeb-469b-a4b2-abc6b8b7b84cSymplectic Elements at OxfordAmerican Physical Society2018Mishra-Sharma, SAlonso, DDunkley, JCosmological measurements over the next decade will enable us to shed light on the content and evolution of the Universe. Complementary measurements of the cosmic microwave background (CMB) and baryon acoustic oscillations are expected to allow an indirect determination of the sum of neutrino masses, within the framework of the flat ΛCDM model. However, possible deviations from ΛCDM such as a nonzero cosmological curvature or a dark energy equation of state with w ≠ −1 would leave similar imprints on the expansion rate of the Universe and clustering of matter. We show how future CMB measurements can be combined with late-time measurements of galaxy clustering and cosmic shear from the Large Synoptic Survey Telescope to alleviate this degeneracy. Together, they are projected to reduce the uncertainty on the neutrino mass sum to 30 meV within this more general cosmological model. Achieving a 3σ measurement of the minimal 60 meV mass sum (or 4σ assuming w ¼ −1) will require a fivefold improved measurement of the optical depth to reionization, obtainable through a large-scale CMB polarization measurement. |
| spellingShingle | Mishra-Sharma, S Alonso, D Dunkley, J Neutrino masses and beyond-ΛCDM cosmology with LSST and future CMB experiments |
| title | Neutrino masses and beyond-ΛCDM cosmology with LSST and future CMB experiments |
| title_full | Neutrino masses and beyond-ΛCDM cosmology with LSST and future CMB experiments |
| title_fullStr | Neutrino masses and beyond-ΛCDM cosmology with LSST and future CMB experiments |
| title_full_unstemmed | Neutrino masses and beyond-ΛCDM cosmology with LSST and future CMB experiments |
| title_short | Neutrino masses and beyond-ΛCDM cosmology with LSST and future CMB experiments |
| title_sort | neutrino masses and beyond λcdm cosmology with lsst and future cmb experiments |
| work_keys_str_mv | AT mishrasharmas neutrinomassesandbeyondlcdmcosmologywithlsstandfuturecmbexperiments AT alonsod neutrinomassesandbeyondlcdmcosmologywithlsstandfuturecmbexperiments AT dunkleyj neutrinomassesandbeyondlcdmcosmologywithlsstandfuturecmbexperiments |