Generalized Phenomenological Models of Dark Energy
Joint Authors
Paul, Prasenjit
Sengupta, Rikpratik
Source
Advances in High Energy Physics
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-02-20
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
It was first observed at the end of the last century that the universe is presently accelerating.
Ever since, there have been several attempts to explain this observation theoretically.
There are two possible approaches.
The more conventional one is to modify the matter part of the Einstein field equations, and the second one is to modify the geometry part.
We shall consider two phenomenological models based on the former, more conventional approach within the context of general relativity.
The phenomenological models in this paper consider a Λ term firstly a function of a¨/a and secondly a function of ρ, where a and ρ are the scale factor and matter energy density, respectively.
Constraining the free parameters of the models with the latest observational data gives satisfactory values of parameters as considered by us initially.
Without any field theoretic interpretation, we explain the recent observations with a dynamical cosmological constant.
American Psychological Association (APA)
Paul, Prasenjit& Sengupta, Rikpratik. 2020. Generalized Phenomenological Models of Dark Energy. Advances in High Energy Physics،Vol. 2020, no. 2020, pp.1-8.
https://search.emarefa.net/detail/BIM-1126595
Modern Language Association (MLA)
Paul, Prasenjit& Sengupta, Rikpratik. Generalized Phenomenological Models of Dark Energy. Advances in High Energy Physics No. 2020 (2020), pp.1-8.
https://search.emarefa.net/detail/BIM-1126595
American Medical Association (AMA)
Paul, Prasenjit& Sengupta, Rikpratik. Generalized Phenomenological Models of Dark Energy. Advances in High Energy Physics. 2020. Vol. 2020, no. 2020, pp.1-8.
https://search.emarefa.net/detail/BIM-1126595
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1126595