Letter: Density Perturbations in a Universe Dominated by the Chaplygin Gas
By J. Fabris, S. Gonçalves, P. E. D. Souza. 2001
222 citations recorded by the source corpus.
We study the fate of density perturbations in a Universe dominate by the Chaplygin gas, which exhibit negative pressure. In opposition to other models of perfect fluid with negative pressure, there is no instability in the small wavelength limit, due to the fact that the sound velocity for the Chaplygin gas is positive. We show that it is possible to obtain the value for the density contrast observed in large scale structure of the Universe by fixing a free parameter in the equation of state of this gas. The negative character of pressure must be significant only very recently.
Subfields: Astronomy and Astrophysics, Mechanical Engineering, Statistical and Nonlinear Physics
View Paper: https://www.semanticscholar.org/paper/2f30b844b626ca4d6d51be8d4891cb78e82677bd
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Astronomy and Astrophysics
In Statistical and Nonlinear Physics
Citations in the corpus
- WMAP and the generalized Chaplygin gas (2003, methodology): “Adding the SNIa constraint.”