Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Gabriele U. Varieschi"'
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 8, Pp 1-70 (2022)
Abstract Multi-fractional theories with integer-order derivatives are models of gravitational and matter fields living in spacetimes with variable Hausdorff and spectral dimension, originally proposed as descriptions of geometries arising in quantum
Externí odkaz:
https://doaj.org/article/db2d520689624ba0b48e419c520b1718
Autor:
Gabriele U. Varieschi
Publikováno v:
Universe, Vol 9, Iss 6, p 246 (2023)
We apply Newtonian fractional-dimension gravity (NFDG), an alternative gravitational model, to some notable cases of galaxies with little or no dark matter. In the case of the ultra-diffuse galaxy AGC 114905, we show that NFDG methods can effectively
Externí odkaz:
https://doaj.org/article/35cc131b0d3643d496f6dad12c0d0c5b
Autor:
Gabriele U. Varieschi
Publikováno v:
Universe, Vol 7, Iss 10, p 387 (2021)
This paper presents a relativistic version of Newtonian Fractional-Dimension Gravity (NFDG), an alternative gravitational model recently introduced and based on the theory of fractional-dimension spaces. This extended version—Relativistic Fractiona
Externí odkaz:
https://doaj.org/article/e737700299b84852950fcad18584b7d8
Autor:
Gabriele U. Varieschi
Publikováno v:
Galaxies, Vol 2, Iss 4, Pp 577-600 (2014)
In this work we analyze kinematical conformal cosmology (KCC), an alternative cosmological model based on conformal Weyl gravity (CG), and test it against current type Ia supernova (SNIa) luminosity data and other astrophysical observations. Expandin
Externí odkaz:
https://doaj.org/article/3869350326ac4c889bc14fd16af72cb0
Autor:
Gabriele U. Varieschi
Publikováno v:
The European Physical Journal Plus. 137
We expand our analysis of Newtonian Fractional-Dimension Gravity (NFDG), an extension of the classical laws of Newtonian gravity to lower dimensional spaces, including those with fractional (i.e., non-integer) dimension. We apply our model to four ro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2933811257728cd46fbe6b26a919186d
https://doi.org/10.1140/epjp/s13360-022-03430-y
https://doi.org/10.1140/epjp/s13360-022-03430-y
Autor:
Gabriele U. Varieschi
Publikováno v:
Foundations of Physics. 50:1608-1644
This paper introduces a possible alternative model of gravity based on the theory of fractional-dimension spaces and its applications to Newtonian gravity. In particular, Gauss's law for gravity as well as other fundamental classical laws are extende
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e5381f5a39430d5299ff0a586d987ee
https://doi.org/10.1007/s10701-020-00389-7
https://doi.org/10.1007/s10701-020-00389-7
Publikováno v:
Journal of High Energy Physics
70 pags., 13 figs.
Multi-fractional theories with integer-order derivatives are models of gravitational and matter fields living in spacetimes with variable Hausdorff and spectral dimension, originally proposed as descriptions of geometries aris
Multi-fractional theories with integer-order derivatives are models of gravitational and matter fields living in spacetimes with variable Hausdorff and spectral dimension, originally proposed as descriptions of geometries aris
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a46f9b0a74c4c5954ff740d42a65a3c
http://arxiv.org/abs/2112.13103
http://arxiv.org/abs/2112.13103
Autor:
Gabriele U. Varieschi
Publikováno v:
Foundations of Physics. 51
Equation (19) in the published paper is incorrect. The divergence of a vector field is obviously a scalar field, even when this operator is acting on a D-dimensional space.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee9e98d5a7db2c923c659fe8d0804e4d
https://doi.org/10.1007/s10701-021-00439-8
https://doi.org/10.1007/s10701-021-00439-8
Autor:
Gabriele U. Varieschi
We continue our analysis of Newtonian Fractional-Dimension Gravity, an extension of the standard laws of Newtonian gravity to lower dimensional spaces including those with fractional (i.e., non-integer) dimension. We apply our model to three rotation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a91df1e04b1028733774cc1d4d59c9e
http://arxiv.org/abs/2011.04911
http://arxiv.org/abs/2011.04911
Autor:
Gabriele U. Varieschi, Jonas Mureika
Publikováno v:
Canadian Journal of Physics. 95:1299-1306
We calculate the characteristics of the "black hole shadow" for a rotating, neutral black hole in fourth-order conformal Weyl gravity. It is shown that the morphology is not significantly affected by the underlying framework, except for very large ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7dbd775348503673d748d9be6943baa1
https://doi.org/10.1139/cjp-2017-0241
https://doi.org/10.1139/cjp-2017-0241