Zobrazeno 1 - 10
of 76
pro vyhledávání: '"Duško Borka"'
Publikováno v:
Symmetry, Vol 16, Iss 4, p 397 (2024)
In this paper we use a modification of the Newtonian gravitational potential with a non-linear Yukawa-like correction, as it was proposed by C. Will earlier to obtain new bounds on graviton mass from the observed orbits of S-stars around the Galactic
Externí odkaz:
https://doaj.org/article/22d94c39b3e44d1a8f32459850b68e74
Publikováno v:
Universe, Vol 8, Iss 2, p 70 (2022)
We estimate the parameters of the Hybrid Palatini gravity model with the Schwarzschild precession of S-stars, specifically of the S2, S38 and S55 stars. We also take into account the case of bulk mass distribution near the Galactic Center. We assume
Externí odkaz:
https://doaj.org/article/d3d257ae4f2042e28afd8d06ad266a65
Publikováno v:
Zbornik Radova: Geografski institut "Jovan Cvijić", Vol 69, Iss 3 (2019)
In this work we used the observed additional perihelion precession in the Solar System, obtained from the observations of planets and spacecrafts, to study the possible existence of Yukawa correction term to the Newtonian gravitational potential. Our
Externí odkaz:
https://doaj.org/article/bc154045d2164ad29e4a3c940260100e
Autor:
Duško Borka, Vesna Borka Jovanović, Salvatore Capozziello, Alexander F. Zakharov, Predrag Jovanović
Publikováno v:
Universe, Vol 7, Iss 11, p 407 (2021)
After giving a short overview of previous results on constraining of Extended Gravity by stellar orbits, we discuss the Schwarzschild orbital precession of S2 star assuming the congruence with predictions of General Relativity (GR). At the moment, th
Externí odkaz:
https://doaj.org/article/b179443b5be648ffb38ea5923de7d820
Autor:
Duško Borka, Vesna Borka Jovanović
Publikováno v:
Atoms, Vol 7, Iss 3, p 88 (2019)
In this study we presented a theoretical investigation of the channeling of high energy protons with the radial deformed (10, 0)@(5, 0) double-wall carbon nanotubes (DWNTs). Proton energy is varied from 0.1 to 10 GeV. The channeling potential within
Externí odkaz:
https://doaj.org/article/50b41f4449dc4f2c97339840e31c0e54
Publikováno v:
Atoms, Vol 7, Iss 1, p 4 (2018)
The global properties of elliptical galaxies are connected through the so-called fundamental plane of ellipticals, which is an empirical relation between their parameters: effective radius, central velocity dispersion and mean surface brightness with
Externí odkaz:
https://doaj.org/article/f32ed76dd6c54e67957f18c3c2c11cb0
Publikováno v:
Galaxies, Vol 6, Iss 1, p 22 (2018)
We demonstrate that the existence of a Noether symmetry in f ( R ) theories of gravity gives rise to an additional gravitational radius, besides the standard Schwarzschild one, determining the dynamics at galactic scales. By this feature, it is possi
Externí odkaz:
https://doaj.org/article/b96eef94bf424c56a0fe8d4d36b61e1f
Publikováno v:
Advances in Space Research
The goal of this paper is to investigate the flux and spectral index distribution of FR II radio galaxy 4C 14.11. We focused on the distribution of flux and spectral indices over the lobes, as well as in their hot spots. For that purpose, we used pub
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d0a14facc3a9a4b18b0e00f5c06b822f
https://doi.org/10.1016/j.asr.2022.05.062
https://doi.org/10.1016/j.asr.2022.05.062
Autor:
Predrag Jovanovic, Vesna Borka Jovanović, Duško Borka, Violeta Nikolic, Nenad Đura Ingeborg Salamon Lazarov
Publikováno v:
Universe
Universe; Volume 8; Issue 2; Pages: 70
Universe; Volume 8; Issue 2; Pages: 70
We estimate the parameters of Hybrid Palatini gravity model with the Schwarzschild precession of S-stars, specifically of S2, S38 and S55 stars. We also take into account case of bulk mass distribution near Galactic Center. We assume that the Schwarz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39775609b6085fbbbef2f266529a4640
http://arxiv.org/abs/2205.02608
http://arxiv.org/abs/2205.02608
Publikováno v:
Advances in Space Research
We investigate the velocity distribution of elliptical galaxies in the framework of Non-local Gravity. According to this approach, it is possible to recover the fundamental plane of elliptical galaxies without the dark matter hypothesis. Specifically
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9365b6dadcf4e0d734b7cd98a97a8e99
https://vinar.vin.bg.ac.rs/handle/123456789/10420
https://vinar.vin.bg.ac.rs/handle/123456789/10420