Modified gravity: Problems and observational manifestations

Arbuzova, E. V. (2012) Modified gravity: Problems and observational manifestations. Il nuovo cimento C, 35 (6). pp. 39-47. ISSN 1826-9885

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Some models of modified gravity and their observational manifestations are considered. It is shown, that gravitating systems with mass density rising with time evolve to a singular state with infinite curvature scalar. The universe evolution during the radiation-dominated epoch is studied in R2-extended gravity theory. Particle production rate by the oscillating curvature is calculated. Possible implications of the model for cosmological creation of non-thermal dark matter are discussed.

Item Type: Article
Uncontrolled Keywords: Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.) ; Dark matter (stellar, interstellar, galactic, and cosmological) ; Relativity and gravitation
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 24 Apr 2020 16:27
Last Modified: 24 Apr 2020 16:27

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