35 citations · 104 across the 10 of their papers we have counts for
10 papers
An entirely analytical cosmological model
Sandro Silva e Costa
The purpose of the present study is to show that in a particular cosmological model, with an affine equation of state, one can obtain, besides the background given by the scale fac…
Relations between the modified Chaplygin gas and a scalar field
Sandro Silva e Costa
In this work the modified Chaplygin gas is related to a cosmological scalar field. Analytical results, more general than the solutions previously shown in the literature, are prese…
Connections among three roads to cosmic acceleration: decaying vacuum, bulk viscosity, and nonlinear fluids
Sandro Silva e Costa, Martin Makler
We discuss the connection among three distinct classes of models often used to explain the late cosmic acceleration: decaying cosmological term, bulk viscous pressure, and nonlinea…
The harmonic oscillator, dimensional analysis and inflationary solutions
Sandro Silva e Costa
In this work, focused on the production of exact inflationary solutions using dimensional analysis, it is shown how to explain inflation from a pragmatic and basic point of view, i…
Casimir energy in finite expanding universes: a prelude
Sandro Silva e Costa, Reuven Opher
We present the Green's functions that are the solutions of the massive Klein-Gordon equation for a scalar field with non-minimal coupling to gravitation for several static and expa…
Generalizing the MOND description of rotation curves
Sandro S. e Costa, R. Opher
We present new mathematical alternatives for explaining rotation curves of spiral galaxies in the MOND context. For given total masses, it is shown that various mathematical altern…