Zobrazeno 1 - 10
of 22
pro vyhledávání: '"R. M. Avagyan"'
Publikováno v:
Astrophysics. 64:355-369
Cosmological evolution is examined in a model with a conformally-coupled scalar field and with a cosmological constant. Models of this type arise in two types of gravitational theory: in the general theory of relativity and in scalar-tensor theories
Publikováno v:
Physics of Atomic Nuclei. 81:894-898
Solutions of the cosmological model are considered within the framework of the modified Jordan–Brans–Dicke theory with a cosmological scalar. A special solution of the model describing an exponential expansion at the early stages and a power-law
Autor:
R. M. Avagyan, G. H. Harutyunyan
Publikováno v:
Astrophysics. 61:122-133
Publikováno v:
Communications of the Byurakan Astrophysical Observatory. :291-302
The spatially flat cosmological models are investigated within the framework of f(R)-gravity. An equivalent representation in the form of a scalar-tensor theory is discussed. For the general case of the f(R) function, the corresponding cosmological e
Publikováno v:
Astrophysics. 60:142-152
The basic idea behind the evolutionary development of the early universe is that the hot stage was preceded by the inflationary stage. In most modern concepts of the inflationary regime, it is assumed that a specific scalar field (inflaton) is presen
Publikováno v:
Gravitation and Cosmology. 22:193-198
The article is a review of cosmological models describing the accelerated expansion of the Universe built by using various conformal representations of the modified Jordan-Brans-Dicke (JBD) theory.
Publikováno v:
Astrophysics. 58:397-405
The problem of stationary gravitational fields is still far from solved, since there is no exact general solution of the Einstein equations for stationary gravitational fields. This paper examines an approach to this problem employing isotropic coord
Publikováno v:
Astrophysics. 57:304-314
In this part of this paper a modified Jordan theory of gravitation is used as a basis for examining the de Sitter cosmological model in the case of a self-consistent scalar field in the presence of a cosmological scalar φ = Λy / y0 . Under a confor
Publikováno v:
Proceedings of The Modern Physics of Compact Stars 2015 — PoS(MPCS2015).
Publikováno v:
Astrophysics. 56:561-568