Revisiting generalized Chaplygin gas as a unified dark matter and dark energy model

Xu, Lixin; Lu, Jianbo; Wang, Yuting

doi:10.1140/epjc/s10052-012-1883-7

Cited by 90 publications

(88 citation statements)

References 59 publications

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“…[90][91][92] In the framework of the so-called dark degeneracy, 93 attempts to provide a unified picture of Dark Matter and Dark Energy have been formulated, e.g., in terms of the Chaplygin gas. [94][95][96][97] S. Capozziello and coworkers recently looked at the so-called Extended Theories of Gravity 98,99 as a new paradigm aiming to encompass, in a self-consistent scheme, problems like inflation, Dark Energy, Dark Matter, large scale structure and, first of all, to give at least an effective description of Quantum Gravity.…”

Section: Introductionmentioning

confidence: 99%

Gravitational anomalies in the solar system?

Iorio

2015

Int. J. Mod. Phys. D

100

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Mindful of the anomalous perihelion precession of Mercury discovered by U. Le Verrier in the second half of the nineteenth century and its successful explanation by A. Einstein with his General Theory of Relativity in the early years of the twentieth century, discrepancies among observed effects in our Solar system and their theoretical predictions on the basis of the currently accepted laws of gravitation applied to known matter-energy distributions have the potential of paving the way for remarkable advances in fundamental physics. This is particularly important now more than ever, given that most of the universe seems to be made of unknown substances dubbed Dark Matter and Dark Energy. Should this not be directly the case, Solar system's anomalies could anyhow lead to advancements in either cumulative science, as shown to us by the discovery of Neptune in the first half of the nineteenth century, and technology itself. Moreover, investigations in one of such directions can serendipitously enrich the other one as well. The current status of some alleged gravitational anomalies in the Solar system is critically reviewed. They are: a) Possible anomalous advances of planetary perihelia; b) Unexplained orbital residuals of a recently discovered moon of Uranus (Mab); c) The lingering unexplained secular increase of the eccentricity of the orbit of the Moon; d) The so-called Faint Young Sun Paradox; e) The secular decrease of the mass parameter of the Sun; f) The Flyby Anomaly; g) The Pioneer Anomaly; and h) The anomalous secular increase of the astronomical unit

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Section: Introductionmentioning

confidence: 99%

Gravitational anomalies in the solar system?

Iorio

2015

Int. J. Mod. Phys. D

100

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“…−0.0161−0.0338 and β = 0.00126 +0.000970+0.00268 −0.00126−0.00126 was obtained from Markov Chain Monte Carlo method [18]. The Chaplygin gas arises as an effective fluid of a generalized d-brane the space time, in a Born-Infeld action [17] and these models have been extensively analyzed in Ref.…”

Section: Introductionmentioning

confidence: 99%

Intermediate-generalized Chaplygin gas inflationary universe model

2013

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An intermediate inflationary universe model in the context of a generalized Chaplygin gas is considered. For the matter we consider two different energy densities; a standard scalar field and a tachyon field, respectively. In general, we discuss the conditions of an inflationary epoch for these models. We also, use recent astronomical observations from Wilkinson Microwave Anisotropy Probe seven year data for constraining the parameters appearing in our models.

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“…The CG was not consistent good with observational data, therefore, the generalized Chaplygin gas (GCG) introduced [5][6][7],…”

Section: +007mentioning

confidence: 94%

Interacting holographic extended Chaplygin gas and phantom cosmology in the light of BICEP2

2015

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Abstract:In this paper, we study the holographic dark energy density and interacting extended Chaplygin gas energy density in the Einstein gravity. We reconstruct the scalar field and the scalar potential describing the extended Chaplygin gas. In the special case, we obtain energy density and investigate some cosmological parameters. Assuming interaction between components we find energy density for some different parametrization of total EoS. We analyze tensor to scalar ratio and use recent observational data of BICEP2 to fix the model parameters.

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Revisiting generalized Chaplygin gas as a unified dark matter and dark energy model

Cited by 90 publications

References 59 publications

Gravitational anomalies in the solar system?

Gravitational anomalies in the solar system?

Intermediate-generalized Chaplygin gas inflationary universe model

Interacting holographic extended Chaplygin gas and phantom cosmology in the light of BICEP2

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