Zobrazeno 1 - 10
of 265
pro vyhledávání: '"Vavryčuk, Václav"'
Autor:
Vavrycuk, Vaclav
Publikováno v:
Front. Astron. Space Sci. 10: 1071743, 2023
Modified Newtonian equations for gravitational orbits in the expanding universe indicate that local gravitationally bounded systems like galaxies and planetary systems are unaffected by the expansion of the Universe. This result is derived under the
Externí odkaz:
http://arxiv.org/abs/2207.08196
Autor:
Vavrycuk, Vaclav, Kroupa, Pavel
The distance-duality relation (DDR) between the luminosity distance $D_L$ and the angular diameter distance $D_A$ is viewed as a powerful tool for testing for the opacity of the Universe, being independent of any cosmological model. It was applied by
Externí odkaz:
http://arxiv.org/abs/2007.10472
Autor:
Vavryčuk, Václav
Publikováno v:
Proceedings of the Royal Society A, 478, 20220045 (2022)
Recent observations indicate that the Universe is not transparent but partially opaque due to absorption of light by ambient cosmic dust. This implies that the Friedmann equations valid for the transparent universe must be modified for the opaque uni
Externí odkaz:
http://arxiv.org/abs/2005.14190
Publikováno v:
In International Journal of Rock Mechanics and Mining Sciences November 2023 171
Autor:
Vavrycuk, Vaclav
Publikováno v:
MNRAS 489, L63-L68, 2019
In this paper, I revoke a debate about an origin of Type Ia supernova (SN Ia) dimming. I argue that except for a commonly accepted accelerating expansion of the Universe, a conceivable alternative for explaining this observation is universe opacity c
Externí odkaz:
http://arxiv.org/abs/1909.05102
Autor:
Vavrycuk, Vaclav
Equations of cosmic dynamics for a model of the opaque Universe are derived and tested on supernovae (SNe) Ia observations. The model predicts a cyclic expansion/contraction evolution of the Universe within a limited range of scale factors. The maxim
Externí odkaz:
http://arxiv.org/abs/1902.10524
Autor:
Vavryčuk, Václav
Publikováno v:
In Journal of Advanced Research April 2023 46:49-59