Zobrazeno 1 - 10
of 138
pro vyhledávání: '"Périco E"'
Publikováno v:
A&A 632, A52 (2019)
Modified gravity (MG) theories aim to reproduce the observed acceleration of the Universe by reducing the dark sector while simultaneously recovering General Relativity (GR) within dense environments. Void studies appear to be a suitable scenario to
Externí odkaz:
http://arxiv.org/abs/1905.12450
Autor:
Perico, E. L. D., Tamayo, D. A.
In cosmology, phenomenologically motivated expressions for running vacuum are commonly parametrized as linear functions $\Lambda(H^2)$ or $\Lambda(R)$. Such kind of models assume an equation of state for vacuum given by $\,\overline P_\Lambda=-\,\ove
Externí odkaz:
http://arxiv.org/abs/1607.07825
We propose a large class of nonsingular cosmologies of arbitrary spatial curvature whose cosmic history is determined by a primeval dynamical $\Lambda (t)$-term. For all values of the curvature, the models evolve between two extreme de Sitter phases
Externí odkaz:
http://arxiv.org/abs/1502.01913
In the present mainstream cosmology, matter and spacetime emerged from a singularity and evolved through four distinct periods: early inflation, radiation, dark matter and late-time inflation (driven by dark energy). During the radiation and dark mat
Externí odkaz:
http://arxiv.org/abs/1306.0591
The gravitational collapse of a spherically symmetric massive core of a star in which the fluid component is interacting with a growing vacuum energy density filling a FLRW type geometry with an arbitrary curvature parameter is investigated. The comp
Externí odkaz:
http://arxiv.org/abs/1303.0430
Autor:
Perico, E. L. D., Bernardini, Alex E.
Publikováno v:
JCAP 06 (2011) 001
Modifications on the predictions about the matter power spectrum based on the hypothesis of a tiny contribution from a degenerate Fermi gas (DFG) test-fluid to some dominant cosmological scenario are investigated. Reporting about the systematic way o
Externí odkaz:
http://arxiv.org/abs/1102.3996
Autor:
Bernardini, Alex E., Perico, E. L. D.
Publikováno v:
JCAP 01 (2011) 10
The hypothesis of a tiny fraction of the cosmic inventory evolving cosmologically as a degenerate Fermi gas test fluid at some dominant cosmological background is investigated. Our analytical results allow for performing preliminary computations to t
Externí odkaz:
http://arxiv.org/abs/1012.4500
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Publikováno v:
OECD Education Working Papers / Documents de Travail de l'OCDE sur l'éducation; 4/19/2023, Issue 289, p1-91, 91p
Akademický článek
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