5 papers
Applications of Cosmological Perturbation Theory in the Late Universe
Jorge L. Fuentes
In this thesis, we discuss some of the applications of cosmological perturbation theory in the late universe. We begin by reviewing the tools used to understand the standard model…
Galaxy number counts at second order in perturbation theory: a leading-order term comparison
Jorge L. Fuentes, Juan Carlos Hidalgo, Karim A. Malik
The galaxy number density is a key quantity to compare theoretical predictions to the observational data from current and future Large Scale Structure surveys. The precision demand…
Galaxy number counts at second order: an independent approach
Jorge L. Fuentes, Juan Carlos Hidalgo, Karim A. Malik
Next generation surveys will be capable of determining cosmological parameters beyond percent level. To match this precision, theoretical descriptions should look beyond the linear…
Linear cosmological perturbations in almost scale-invariant fourth-order gravity
Jorge L. Fuentes, Usman A. Gillani, Karim A. Malik
We study a class of almost scale-invariant modified gravity theories, using a particular form of where and are the Ricci and Gauss-Bonnet scala…
Gravitational waves in a flat radiation-matter universe including anisotropic stress
Andrew J. Wren, Jorge L. Fuentes, Karim A. Malik
We present novel analytical solutions for linear-order gravitational waves or tensor perturbations in a flat Friedmann-Robertson-Walker universe containing two perfect fluids, radi…