Cosmology and Gravitation
62 Followers
Recent papers in Cosmology and Gravitation
Two Hamiltonian formulations of General Relativity, due to Pirani, Schild and Skinner (Phys. Rev. 87, 452, 1952) and Dirac (Proc. Roy. Soc. A 246, 333, 1958), are considered. Both formulations, despite having different expressions for... more
In this paper we study scalar perturbations of the metric for nonlinear f(R) models. We consider the Universe at the late stage of its evolution and deep inside the cell of uniformity. We investigate the astrophysical approach in the case... more
In this paper we will illustrate how to constrain unavoidable Kähler corrections for N = 1 supergravity (SUGRA) inflation from the recent Planck data. We will show that the non-renormalizable Kähler operators will induce in general... more
The following assumptions of the Big Bang theory are challenged and found to be false: the cosmological principle, the assumption that all matter formed at the same time and the assumption regarding the cause of the cosmic microwave... more
We have found an exact, analytic, closed-form bound state solution to the Schrodinger Newton Equation in the Field Energy Dominance Model for a particle in its own spherically symmetric gravitational field. On comparison with the best-fit... more
Too many physicists believe the ‘phallacy’ that the quantum is more fundamental than relativity without any valid supporting evidence, so the earliest attempts to unify physics based on the continuity of relativity have been all but... more
We consider the Universe deep inside the cell of uniformity. At these scales, the Universe is filled with inhomogeneously distributed discrete structures (galaxies, groups and clusters of galaxies), which perturb the background Friedmann... more
We investigate a point-like massive source in non-linear f(R) theories in the case of arbitrary number of spatial dimensions D\geq 3. If D>3 then extra dimensions undergo toroidal compactification. We consider a weak-field approximation... more
Readers are advised that an up-to-date discussion of the author's fundamental thesis (’The Idea’), on the origin, operation, and destiny of the World, is now found at the top of the main page under the rubric, Thematic Evolution and... more
The life to Earth came from the Universe: the part is alive due to the Entire, this world is alive thanks to the Whole. The first tribe of our Earth w ere Scythians, people from the Moon; their selenic language was the root to earthly... more
A self-consistent Einstein-Maxwell model is formulated for the case when motion of the medium is characterized by non-vanishing expansion, acceleration, shear and vorticity. The model is based on a decomposition of the Lagrangian in an... more
In the framework of a cosmological model of the Universe filled with a nonrelativistic particle soup, we easily reproduce inflation due to the quantum potential. The lightest particles in the soup serve as a driving force of this simple,... more
The Hamiltonian formulation of tetrad gravity in any dimension higher than two, using its first-order form where tetrads and spin connections are treated as independent variables, is discussed, and the complete solution of the... more
A geometrical explanation of Dark Matter and Dark Energy is easy to develop. It makes testable predictions and is thus completely falsifiable. The theory is based on a macroscopically extended fourth dimension of space, yielding a... more
This work examines a question of a true place of Moon in the whole Universe. Meanwhile the contemporary atheistic per se science considers it as a lifeless Earth adjunct it is actually an axis of the Universe and the throne of God. Being... more
We calculate the present expansion of our Universe endowed with relict colored objects - quarks and gluons - that survived hadronization either as isolated islands of quark-gluon "nuggets", or spread uniformly in the Universe. In the... more
This letter points out that the values of `critical-acceleration' of MOND, and the `accelerated-expansion' of the universe are just two of the fourteen strikingly equal values of accelerations recurring in different physical situations.... more
In this paper we study scalar perturbations of the metric for nonlinear $f(R)$ models. We consider the Universe at the late stage of its evolution and deep inside the cell of uniformity. We investigate the astrophysical approach in the... more
A static three-parameter family of solutions of the coupled Einstein-Maxwell equations on the background of spheriodal space-times is obtained, and its suitability for describing the interior space-time of a charged superdense fluid... more
This paper is devoted to different modifications of two standard softenings of the gravitational attraction (namely the Plummer and Hernquist softenings), which are commonly used in cosmological simulations based on the particle-particle... more
It is shown that a transition from a multidimensional cosmological model with one internal space (of the dimension d1) to the effective tree-level bosonic string corresponds to an infinite number of the internal dimensions: d1 → ∞.
We review aspects of quantisation of the 11-dimensional supermembrane world volume theory. We explicitly construct vertex operators for the massless states and study interactions of supermembranes. The open supermembrane and its vertex... more
We obtain the equations of motions of the f (T ) theory considering the Lemaître-Tolman-Bondi's metric for a set of diagonal and non-diagonal tetrads. In the case of diagonal tetrads the equations of motion of the f (T ) theory impose a... more
The Hawking effect and the Unruh effect are two of the most important predictions in the theoretical physics of the last quarter of the 20th century. In parallel to the theoretical investigations there is great interest in the possibility... more
In Kaluza-Klein models with an arbitrary number of toroidal internal spaces, we investigate soliton solutions which describe the gravitational field of a massive compact object. We single out the physically interesting solution... more
Truth аbout the Guests of Earth in questions and answers. // Правда о Гостях Земли в вопросах и ответах.
Some recent experiments on cavitation of water by ultrasounds and on electric explosion of foils in liquids seem to provide evidence for nuclear processes induced by pressure waves (piezonuclear reactions). We hypothesize that such a kind... more
We review a possible non-minimal coupling (dilatonic) of a scalar field (axion like particle) to electromagnetism, through experimental and observational constraints. Such a coupling is motivated from recent quasar spectrum observations... more
A self-consistent system of interaction nonlinear spinor and scalar fields within the scope of a BI cosmological model filled with perfect fluid is considered. The role of spinor field in the evolution of the Universe is studied. It is... more
Some recent papers have claimed the existence of static, spherically symmetric wormhole solutions to gravitational field equations in the absence of ghost (or phantom) degrees of freedom. We show that in some such cases the solutions in... more
We discuss the weak-field limit of induced gravity and show that results directly depend on the coupling and self-interaction potential of the scalar field. A static spherically symmetric exact solution is found and its conformal... more
The problem of general-relativistic adiabatic collapse of a uniform-density perfect sphere has been studied since Wyman (Phys. Rev. 70, 396, (1946)) [1]. Apparently, there could be bouncing and oscillating solutions in such a case, as... more
TO READ THE PREVIEW SCROLL DOWN TO READ THE PREVIEW SCROLL DOWN A connected discussion of Absolute Physics and modern cosmology emphasizing gravitation and inertia, with concluding remarks on the rageful “spiritus mundi” that is said... more
In this paper we will illustrate how to constrain unavoidable K\"ahler corrections for ${\cal N}=1$ supergravity (SUGRA) inflation from the recent Planck data. We will show that non-renormalizable K\"ahler operators will induce in... more
Self-consistent solutions to the spinor, scalar and BI gravitational field equations are obtained. The problems of initial singularity and asymptotically isotropization process of the initially anisotropic space-time are studied. It is... more
We investigate the classical gravitational tests for the six-dimensional Kaluza-Klein model with spherical (of a radius a) compactification of the internal space. The model contains also a bare multidimensional cosmological constant Λ6.... more
Scalar cosmological perturbations are investigated in the framework of a model with interacting dark energy and dark matter. In addition to these constituents, the inhomogeneous Universe is supposed to be filled with the standard... more
The problem of creation of Unitary Field theory, or the Theory of Everything, which the Einstein was so eager to solve by means of physics, remained unsolved since it is solvable only by means of the Word: because the Word, according to... more
We extend the Einstein-Maxwell-axion theory including into the Lagrangian cross-terms of the dynamo-optical type, which are quadratic in the Maxwell tensor, linear in the covariant derivative of the macroscopic velocity four-vector, and... more
The structure of classical spinning particle based on the Kerr-Newman black hole (BH) solution is investigated. For large angular momentum, |a| >> m, the BH horizons disappear exposing a naked ringlike source which is a circular... more
Properties of the rotating Kerr-Newman black hole solution allow to relate it with spinning particles. Singularity of black hole (BH) can be regularized by a metric deformation. In this case, as a consequence of the Einstein equations, a... more
We show that in imaginary time quantum metric fluctuations of empty space form a self-consistent de Sitter gravitational instanton that can be thought of as describing tunneling from "nothing" into de Sitter space of real time (no... more
We investigate the family of electrostatic spherically symmetric solutions of the five-dimensional Kaluza-Klein theory. Both charged and neutral cases are considered. The analysis of the solutions, through their geometrical properties,... more
We present three reasons for rewriting the Einstein equation. The new version is physically equivalent but geometrically more clear. 1.
Matter engenders a Modified Newtonian Gravitational Potential (MNGP) that has a singularity at a two Normalized Spatial Unit (NSU) distance with a modified gravitational field constant in distance > 2 NSU region, and a saturated potential... more