Zobrazeno 1 - 10
of 117
pro vyhledávání: '"Ruth Lazkoz"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 6, Pp 1-17 (2022)
Abstract The field equations of modified gravity theories, when considering a homogeneous and isotropic cosmological model, always become autonomous differential equations. This relies on the fact that in such models all variables only depend on cosm
Externí odkaz:
https://doaj.org/article/6b361989dc9c49c097a70692dda4f62d
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 3, Pp 1-10 (2021)
Abstract In this work, we further study a metric modified theory of gravity which contains a non-minimal coupling to matter, more precisely, we assume two functions of the scalar curvature, $$f_1$$ f 1 and $$f_2$$ f 2 , where the first one generalise
Externí odkaz:
https://doaj.org/article/bf43f967600446058eab2ef31680f324
Publikováno v:
Universe, Vol 9, Iss 4, p 166 (2023)
Modified gravity theories can be used for the description of homogeneous and isotropic cosmological models through the corresponding field equations. These can be cast into systems of autonomous differential equations because of their sole dependence
Externí odkaz:
https://doaj.org/article/836c725adc4b43638f085a17440bd354
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 11, Pp 1-6 (2018)
Abstract The study of the dynamics of a two-body system in modified gravity constitutes a more complex problem than in Newtonian gravity. Numerical methods are typically needed to solve the equations of geodesics. Despite the complexity of the proble
Externí odkaz:
https://doaj.org/article/1031303fa4f144f98cd84f7d5ca39015
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 3, Pp 1-12 (2018)
Abstract It is a very well established matter nowadays that many modified gravity models can offer a sound alternative to General Relativity for the description of the accelerated expansion of the universe. But it is also equally well known that no c
Externí odkaz:
https://doaj.org/article/14df3510e9af45e68de74b522f29d8e2
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 1, Pp 1-14 (2018)
Abstract The cosmological redshift drift could lead to the next step in high-precision cosmic geometric observations, becoming a direct and irrefutable test for cosmic acceleration. In order to test the viability and possible properties of this effec
Externí odkaz:
https://doaj.org/article/1049f19bdb024356958e9b053fd51c9f
Publikováno v:
Physics Letters B, Vol 741, Iss , Pp 168-177 (2015)
We review the appropriateness of using SNIa observations to detect potential signatures of anisotropic expansion in the Universe. We focus on Union2 and SNLS3 SNIa datasets and use the hemispherical comparison method to detect possible anisotropic fe
Externí odkaz:
https://doaj.org/article/b7a7255a66454660b4cda22fca13c63f
Publikováno v:
Galaxies, Vol 6, Iss 1, p 10 (2018)
The cold dark matter (CDM) paradigm successfully explains the cosmic structure over an enormous span of redshifts. However, it fails when probing the innermost regions of dark matter halos and the properties of the Milky Way’s dwarf galaxy satellit
Externí odkaz:
https://doaj.org/article/fab2812ec4784f2fb467b722c49765f0
Publikováno v:
Physical Review D. 105
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e3ab782a8838e00a5fa73adc4da0109
https://doi.org/10.1103/physrevd.105.083534
https://doi.org/10.1103/physrevd.105.083534
Publikováno v:
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 380
The discovery of accelerated expansion of the universe opened the possibility of new scenarios for the doom of our spacetime, besides aeternal expansion and a final contraction. In this paper we review the chances which may await our universe. In par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a91aaf0287e5f3cf65f2a91afe572efd
https://doi.org/10.1098/rsta.2021.0333
https://doi.org/10.1098/rsta.2021.0333