Observational future of cosmological scalar-tensor theories
The next generation of surveys will greatly improve our knowledge of cosmological gravity. In this paper we focus on how Stage IV photometric redshift surveys, including weak lensing and multiple tracers of the matter distribution and radio experiments combined with measurements of the cosmic microw...
| Hlavní autoři: | , , , |
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| Médium: | Journal article |
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American Physical Society
2017
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| _version_ | 1826292052419149824 |
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| author | Alonso, D Bellini, E Ferreira, P Zumalacárregui, M |
| author_facet | Alonso, D Bellini, E Ferreira, P Zumalacárregui, M |
| author_sort | Alonso, D |
| collection | OXFORD |
| description | The next generation of surveys will greatly improve our knowledge of cosmological gravity. In this paper we focus on how Stage IV photometric redshift surveys, including weak lensing and multiple tracers of the matter distribution and radio experiments combined with measurements of the cosmic microwave background will lead to precision constraints on deviations from General Relativity. We use a broad subclass of Horndeski scalar-tensor theories to forecast the accuracy with which we will be able to determine these deviations and their degeneracies with other cosmological parameters. Our analysis includes relativistic effects, does not rely on the quasi-static evolution and makes conservative assumptions about the effect of screening on small scales. We define a figure of merit for cosmological tests of gravity and show how the combination of different types of surveys, probing different length scales and redshifts, can be used to pin down constraints on the gravitational physics to better than a few percent, roughly an order of magnitude better than present probes. Future cosmological experiments will be able to constrain the Brans-Dicke parameter at a level comparable to Solar System and astrophysical tests |
| first_indexed | 2024-03-07T03:08:45Z |
| format | Journal article |
| id | oxford-uuid:b3738d12-a32b-4a07-ad3b-a0e8604d8865 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T03:08:45Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:b3738d12-a32b-4a07-ad3b-a0e8604d88652022-03-27T04:19:17ZObservational future of cosmological scalar-tensor theoriesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b3738d12-a32b-4a07-ad3b-a0e8604d8865Symplectic Elements at OxfordAmerican Physical Society2017Alonso, DBellini, EFerreira, PZumalacárregui, MThe next generation of surveys will greatly improve our knowledge of cosmological gravity. In this paper we focus on how Stage IV photometric redshift surveys, including weak lensing and multiple tracers of the matter distribution and radio experiments combined with measurements of the cosmic microwave background will lead to precision constraints on deviations from General Relativity. We use a broad subclass of Horndeski scalar-tensor theories to forecast the accuracy with which we will be able to determine these deviations and their degeneracies with other cosmological parameters. Our analysis includes relativistic effects, does not rely on the quasi-static evolution and makes conservative assumptions about the effect of screening on small scales. We define a figure of merit for cosmological tests of gravity and show how the combination of different types of surveys, probing different length scales and redshifts, can be used to pin down constraints on the gravitational physics to better than a few percent, roughly an order of magnitude better than present probes. Future cosmological experiments will be able to constrain the Brans-Dicke parameter at a level comparable to Solar System and astrophysical tests |
| spellingShingle | Alonso, D Bellini, E Ferreira, P Zumalacárregui, M Observational future of cosmological scalar-tensor theories |
| title | Observational future of cosmological scalar-tensor theories |
| title_full | Observational future of cosmological scalar-tensor theories |
| title_fullStr | Observational future of cosmological scalar-tensor theories |
| title_full_unstemmed | Observational future of cosmological scalar-tensor theories |
| title_short | Observational future of cosmological scalar-tensor theories |
| title_sort | observational future of cosmological scalar tensor theories |
| work_keys_str_mv | AT alonsod observationalfutureofcosmologicalscalartensortheories AT bellinie observationalfutureofcosmologicalscalartensortheories AT ferreirap observationalfutureofcosmologicalscalartensortheories AT zumalacarreguim observationalfutureofcosmologicalscalartensortheories |