Zobrazeno 1 - 10
of 92
pro vyhledávání: '"Dokuchaev, Vyacheslav"'
Short review of the Weyl geometry is given. To describe the phenomenological particle creation we suggest the modified perfect fluid model taking into account the back reaction on the geometry of both the already created particles and the very proces
Externí odkaz:
http://arxiv.org/abs/2401.06235
Publikováno v:
Gravitation and Cosmology, 2024, Vol. 30, No. 3, pp. 246-253
We describe the possible forms of black hole images, viewed by a distant observer. These images are numerically calculated basing on general relativity and equations of motion in the Kerr-Newman metric. Black hole image is a gravitationally lensed im
Externí odkaz:
http://arxiv.org/abs/2401.01694
We describe quantum correction to the accreting hot plasma onto black holes. This quantum correction is related with the Hawking radiation, which heats the accreting plasma. The hot accreting gas is heated additionally by the quantum Hawking radiatio
Externí odkaz:
http://arxiv.org/abs/2312.16849
Publikováno v:
Zh.Exp.Teor.Fiz. Vol. 165, 800-806 (2024)
We generalize the notion of Einstein-Rosen bridge by defining it as a space-like connection between two universes with regions of asymptotically minkowskian space-time infinities. The corresponding symmetry and asymmetry properties of the generalized
Externí odkaz:
http://arxiv.org/abs/2312.15870
Publikováno v:
Astronomy 2, no. 3: 141-152 (2023)
We reconstructed dark spots in the images of supermassive black holes SgrA* and M87* provided by the Event Horizon Telescope (EHT) collaboration by using the geometrically thin accretion disk model. In this model, the black hole is highlighted by the
Externí odkaz:
http://arxiv.org/abs/2307.14714
These are lectures for students at the summer school conducted by the Faculty of Fundamental Sciences, Bauman Moscow State Technical University at 2022.
Comment: 20 pages
Comment: 20 pages
Externí odkaz:
http://arxiv.org/abs/2208.04906
Autor:
Dokuchaev, Vyacheslav I.
Publikováno v:
Astronomy 2022, 1(2), 93-98
We elucidate the physical origin of the dark spot in the image of supermassive black hole SgrA* presented very recently by the EHT collaboration. It is argued that this dark spot, which is noticeably smaller than the classical black hole shadow, is t
Externí odkaz:
http://arxiv.org/abs/2206.05019
Publikováno v:
Physics 2021, 3(4), 814-820
In this paper, conformal invariant gravitation, based on Weyl geometry, is considered. In addition to the gravitational and matter action integrals, the interaction between the Weyl vector (entered in Weyl geometry) and the vector, representing the w
Externí odkaz:
http://arxiv.org/abs/2109.13544
Publikováno v:
JCAP11(2021)053
We investigated the possibility of construction the homogeneous and isotropic cosmological solutions in Weyl geometry. We derived the self-consistency condition which ensures the conformal invariance of the complete set of equations of motion. There
Externí odkaz:
http://arxiv.org/abs/2107.06160
Publikováno v:
Gen Relativ Gravit 53, 83 (2021)
We study the general relativistic motion of a bright spot in a jet from an accreting black hole. The corresponding lensed images of the moving bright spot are calculated numerically in discrete time intervals along the bright spot trajectory in the K
Externí odkaz:
http://arxiv.org/abs/2010.01885