Российский фонд
фундаментальных
исследований

Физический факультет
МГУ им. М.В.Ломоносова
 

F

Fabris J.C.

 

Chervon S.V., Fabris J.C., Fomin I.V. «Spherical symmetric solutions of f(r) gravity with a kinetic curvature scalar» Пространство, время и фундаментальные взаимодействия, № 1, с. 53-65 (2020)

We consider modified f/(R) gravity with a kinetic curvature scalar as a chiral self-gravitating model in a spherically symmetric spacetime. Most attention devoted to finding solutions for special case of scaling transformation when modified gravity transforms to Einstein frame from Jordan one. We proposed the method of determination of kinetic function for given scalar field dependence on space coordinate. New classes of solutions are found for special choice of f/(R) function.

Пространство, время и фундаментальные взаимодействия, № 1, с. 53-65 (2020) | Рубрика: 18

Fathi M.

 

Fathi M., Villanueva J.R. «The role of elliptic integrals in calculating the gravitational lensing of a charged Weyl black hole surrounded by plasma» Вестник Камчатской региональной ассоциации "Учебно-научный центр" (КРАУНЦ). Серия: Физико-математические науки, 36, № 3, с. 165-188 (2021)

We mainly aim at highlighting the importance of (hyper-)elliptic integrals in the study of gravitational effects caused by strongly gravitating systems. For this, we study the application of elliptic integrals in calculating the light deflection as it passes a plasmic medium, surrounding a charged Weyl black hole. To proceed with this, we consider two specific algebraic ansatzes for the plasmic refractive index, and we characterize the photon sphere for each of the cases. This will be used further to calculate the angular diameter of the corresponding black hole shadow. We show that the complexity of the refractive index expressions, can result in substantially different types of dependencies of the light behavior on the spacetime parameters.

Вестник Камчатской региональной ассоциации "Учебно-научный центр" (КРАУНЦ). Серия: Физико-математические науки, 36, № 3, с. 165-188 (2021) | Рубрика: 18

Fedorov P.N.

 

Velichko A.B., Fedorov P.N. «Kinematics of the milky way from velocities of young red clump giants using the PMA and GAIA DR2 data» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 31, с. 123-127 (2018)

https://doi.org/10.18524/1810-4215.2018.31.144742

Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 31, с. 123-127 (2018) | Рубрика: 18

Fomin I.V.

 

Chervon S.V., Fabris J.C., Fomin I.V. «Spherical symmetric solutions of f(r) gravity with a kinetic curvature scalar» Пространство, время и фундаментальные взаимодействия, № 1, с. 53-65 (2020)

We consider modified f/(R) gravity with a kinetic curvature scalar as a chiral self-gravitating model in a spherically symmetric spacetime. Most attention devoted to finding solutions for special case of scaling transformation when modified gravity transforms to Einstein frame from Jordan one. We proposed the method of determination of kinetic function for given scalar field dependence on space coordinate. New classes of solutions are found for special choice of f/(R) function.

Пространство, время и фундаментальные взаимодействия, № 1, с. 53-65 (2020) | Рубрика: 18

Morozov A.N., Pustovoit V.I., Fomin I.V. «On the gravitational waves coupled with electromagnetic waves» Пространство, время и фундаментальные взаимодействия, № 2, с. 53-63 (2020)

A description is made of the process of excitation of coupled longitudinal-transverse gravitational waves during the propagation of a strong electromagnetic wave in a vacuum and when a standing electromagnetic wave exists in the Fabry–Perot resonator. It is shown that such waves lead to the appearance of transverse gravitational waves in empty space. It was established that two standing high-frequency electromagnetic waves in a Fabry-Perot resonator with close frequencies cause the appearance of a low-frequency transverse gravitational wave in empty space.

Пространство, время и фундаментальные взаимодействия, № 2, с. 53-63 (2020) | Рубрика: 18

Fomin I.V., Chervon S.V., Maharaj S.D. «Application of the Schrödinger equation in exact scalar field cosmology» Пространство, время и фундаментальные взаимодействия, № 2, с. 83-94 (2020)

We propose a new method of exact solutions construction for scalar field cosmology based on representation of the Einstein–Friedmann dynamic equations as Schrödinger-like one. This representation allows one to compare the solutions of quantum-mechanical and cosmological problems. On the other hand, this approach makes it possible to use the well-known form-invariant transformations of the Schrödinger equation to generate exact cosmological solutions. As an example of the application of this method, the use of the Darboux transformations in scalar field cosmology is considered. On the other hand, the presented methods make it possible to generalize the obtained solutions to multi-field cosmological models.

Пространство, время и фундаментальные взаимодействия, № 2, с. 83-94 (2020) | Рубрика: 18