CONSTRAINING SCALE DEPENDENT GROWTH WITH REDSHIFT SURVEYS

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dc.contributor.authorDenissenya, Mikhail
dc.contributor.authorLinder, Eric V.
dc.date.accessioned2023-03-29T05:15:44Z
dc.date.available2023-03-29T05:15:44Z
dc.date.issued2022
dc.description.abstractOngoing and future redshift surveys have the capability to measure the growth rate of large scale structure at the percent level over a broad range of redshifts, tightly constraining cosmological parameters. Beyond general relativity, however, the growth rate in the linear density perturbation regime can be not only redshift dependent but scale dependent, revealing important clues to modified gravity. We demonstrate that a fully model independent approach of binning the gravitational strength Geff (k,z) matches scalar-tensor results for the growth rate fσ8(k,z) to 0.02%–0.27% rms accuracy. For data of the quality of the Dark Energy Spectroscopic Instrument (DESI) we find the bin values can be constrained to 1.4%–28%. We also explore the general scalar-tensor form, constraining the amplitude and past and future scalaron mass/shape parameters. Perhaps most interesting is the strong complementarity of low redshift peculiar velocity data with DESI-like redshift space distortion measurements, enabling improvements up to a factor 6–7 on 2D joint confidence contour areas. Finally, we quantify some issues with gravity parametrizations that do not include all the key physics.en_US
dc.identifier.citationDenissenya, M., & Linder, E. V. (2022). Constraining scale dependent growth with redshift surveys. Journal of Cosmology and Astroparticle Physics, 2022(11), 029. https://doi.org/10.1088/1475-7516/2022/11/029en_US
dc.identifier.urihttp://nur.nu.edu.kz/handle/123456789/6994
dc.language.isoenen_US
dc.publisherJournal of Cosmology and Astroparticle Physicsen_US
dc.rightsAttribution-NonCommercial-ShareAlike 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/us/*
dc.subjectType of access: Open Accessen_US
dc.subjectgalaxy clusteringen_US
dc.subjectmodified gravityen_US
dc.subjectredshift surveysen_US
dc.titleCONSTRAINING SCALE DEPENDENT GROWTH WITH REDSHIFT SURVEYSen_US
dc.typeArticleen_US
workflow.import.sourcescience

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