Publication:
The growth factor parametrization versus numerical solutions in flat and non-flat dark energy models

Дата
2020
Авторы
Velasquez-Toribio, A. M.
Fabris, J. C.
Journal Title
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Научные группы
Организационные подразделения
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Организационная единица
Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
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Аннотация
© 2020, The Author(s).In the present investigation we use observational data of fσ8 to determine observational constraints in the plane (Ω m, σ8) using two different methods: the growth factor parametrization and the numerical solutions method for density contrast, δm. We verified the correspondence between both methods for three models of accelerated expansion: the Λ CDM model, the wwaCDM model and the running cosmological constant RCC model. In all case we consider also the curvature as free parameter. The study of this correspondence is important because the growth factor parametrization method is frequently used to discriminate between competitive models. Our results we allow us to determine that there is a good correspondence between the observational constrains using both methods. We also test the power of the fσ8 data to constraints the curvature parameter within the Λ CDM model. For this we use a non-parametric reconstruction using Gaussian processes. Our results show that the fσ8 data with the current precision level does not allow to distinguish between a flat and non-flat universe.
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Velasquez-Toribio, A. M. The growth factor parametrization versus numerical solutions in flat and non-flat dark energy models / Velasquez-Toribio, A.M., Fabris, J.C. // European Physical Journal C. - 2020. - 80. - № 12. - 10.1140/epjc/s10052-020-08785-z
URI
https://www.doi.org/10.1140/epjc/s10052-020-08785-z
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85098278702&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000605608000006
 https://openrepository.mephi.ru/handle/123456789/23021
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