Zobrazeno 1 - 10
of 26
pro vyhledávání: '"da Silva, W. J. C."'
Publikováno v:
JCAP08(2021)035
Many new strong gravitational lensing (SGL) systems have been discovered in the last two decades with the advent of powerful new space and ground-based telescopes. The effect of the lens mass model (usually the power-law mass model) on cosmological p
Externí odkaz:
http://arxiv.org/abs/2104.06202
Autor:
da Silva, W. J. C., Silva, R.
Publikováno v:
Eur.Phys.J.C 81 (2021) 5, 403
In this work, we study the extended viscous dark energy models in the context of matter perturbations. To do this, we assume an alternative interpretation of the flat Friedmann-Lema\^itre-Robertson-Walker Universe, through the nonadditive entropy and
Externí odkaz:
http://arxiv.org/abs/2011.09516
Autor:
da Silva, W. J. C., Silva, R.
Publikováno v:
Eur. Phys. J. Plus 136, 543 (2021)
We investigate the Tsallis holographic dark energy (THDE) models in the context of perturbations' growth. We assume the description of dark energy by considering the holographic principle and the nonadditive entropy to carry out this. We implement th
Externí odkaz:
http://arxiv.org/abs/2011.09520
Publikováno v:
Eur. Phys. J. Plus 135, 918 (2020)
In this paper, we present a unified scheme based on the fluid description of the dark sector of the universe. The scheme captures models with interaction between dark energy and dark matter, being the core of generalization the time-varying equation-
Externí odkaz:
http://arxiv.org/abs/2009.10216
Autor:
Holanda, R. F. L., da Silva, W. J. C.
Publikováno v:
JCAP12(2020)027
An important result from self-similar models that describe the process of galaxy cluster formation is the simple scaling relation $Y_{\rm SZE}D_{\rm A}^{2}/C_{\rm XSZE}Y_{\rm X}= C$. In this ratio, $Y_{\rm SZE}$ is the integrated Sunyaev-Zel'dovich e
Externí odkaz:
http://arxiv.org/abs/2007.14199
Publikováno v:
Phys. Rev. D 102, 063513 (2020)
The cosmic distance duality relation (CDDR), $D_{\rm L}(1+z)^{-2}/D_{\rm A}=\eta=1$, with $D_{\rm L}$ and $D_{\rm A}$, being the luminosity and angular diameter distances, respectively, is a crucial premise in cosmological scenarios. Many investigati
Externí odkaz:
http://arxiv.org/abs/2005.04131
Autor:
da Silva, W. J. C., Silva, R.
Publikováno v:
JCAP 05 (2019) 036
We propose an approach considering the nonextensive effects in the context of the Verlinde theory in order to address an extended cosmological model in the context of viscous dark energy. Specifically, this model leads to a tiny perturbation in the d
Externí odkaz:
http://arxiv.org/abs/1810.03759
Publikováno v:
Astroparticle Physics 105 (2019) 37-43
In this work we discuss a general approach for the dissipative dark matter considering a nonextensive bulk viscosity and taking into account the role of generalized Friedmann equations. This generalized $\Lambda$CDM model encompasses a flat universe
Externí odkaz:
http://arxiv.org/abs/1809.07797
Autor:
da Silva, W. J. C.1 (NURSE) williamjouse@fisica.ufrn.br, Silva, R.1,2 (NURSE)
Publikováno v:
European Physical Journal C -- Particles & Fields. May2021, Vol. 81 Issue 5, p1-19. 19p.
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