77 citations · 501 across the 21 of their papers we have counts for
21 papers
Geometric Cosmology models: statistical analysis with observational data
Matías Leizerovich, Luisa G. Jaime, Susana J. Landau +1
Although the standard cosmological model is capable of explaining most current observational data, it faces some theoretical and observational issues. This is the main motivation f…
On Geometric Cosmology
Gustavo Arciniega, Luisa G. Jaime, Susana J. Landau +1
We present a modification to General Relativity by making a redefinition of the coupling constant in front of the Ricci curvature scalar along with the Generalized Quasi-topologica…
A unified geometric description of the Universe: from inflation to late-time acceleration without an inflaton nor a cosmological constant
Luisa G. Jaime, Gustavo Arciniega
We present a cosmological model arising from a gravitational theory with an infinite tower of higher-order curvature invariants that can reproduce the entire evolution of the Unive…
On the viability of the evolution of the universe with Geometric Inflation
Luisa G. Jaime
We perform a general analysis of the cosmological viability of Geometric Inflation. We show that the evolution of the universe, from inflation to the present day, can be seen from…
Implementation of two-field inflation for cosmic linear anisotropy solving system
Braulio Morales-Martínez, Gustavo Arciniega, Luisa G. Jaime +1
We outline the modifications in the numerical Boltzmann code Cosmic Linear Anisotropy Solving System (CLASS) in order to include extra inflationary fields. The functioning of the c…
A single parameterization for dark energy and modified gravity models
Mariana Jaber, Gustavo Arciniega, Luisa G. Jaime +1
Perhaps the most explored hypothesis for the accelerated cosmic expansion rate arises in the context of extra fields or modifications to General Relativity. A prevalent approach is…
Inflationary predictions of Geometric Inflation
Gustavo Arciniega, Luisa Jaime, Gabriella Piccinelli
In the framework of gravitational models obtained from the Geometric Inflation's proposal, where an infinite tower of curvature scalars are included into the action, we compute the…
Geometric Inflation
Gustavo Arciniega, Pablo Bueno, Pablo A. Cano +3
We argue that the presence of an inflationary epoch is a natural, almost unavoidable, consequence of the existence of a sensible effective action involving an infinite tower of hig…
Towards geometric inflation: the cubic case
Gustavo Arciniega, Jose D. Edelstein, Luisa G. Jaime
We present an up to cubic curvature correction to General Relativity with the following features: (i) its vacuum spectrum solely consists of a graviton and is ghost-free, (ii) it p…
Modified gravity for surveys
Luisa G. Jaime, Mariana Jaber, Celia Escamilla-Rivera
We present a new parameterization for the equation of state (EoS) , which can reproduce a -like evolution with a precision between over the numer…
Cosmic acceleration in asymptotically Ricci flat Universe
Luisa G. Jaime, Marcelo Salgado
We analyze the evolution of a Friedmann-Robertson-Walker spacetime within the framework of metric gravity using an exponential model. We show that gravity may lead to…
Lemaitre-Tolman-Bondi dust solutions in f(R) gravity
Roberto A Sussman, Luisa G Jaime
We derive a class of non-static inhomogeneous dust solutions in f(R) gravity described by the Lemaitre-Tolman-Bondi (LTB) metric. The field equations are fully integrated for all p…
Spherically symmetric black holes in gravity: Is geometric scalar hair supported ?
Pedro Cañate, Luisa G. Jaime, Marcelo Salgado
We discuss with a rather critical eye the current situation of black hole (BH) solutions in gravity and shed light about its geometrical and physical significance. We also a…
Diagnostic of under the function
Luisa G. Jaime
We perform the twopoint diagnostic for the function proposed by Sahni in 2014 for the Starobinsky and Hu & Sawicki models in gravity. We show that t…
Habitable Zones with Stable Orbits for Planets around Binary Systems
L. G. Jaime, L. Aguilar, B. Pichardo
A general formulation to compute habitable zones (HZ) around binary stars is presented. A HZ in this context must satisfy two separate conditions: a radiative one and one of dynami…
Note on the equation of state of geometric dark-energy in f(R) gravity
Luisa G. Jaime, Leonardo Patiño, Marcelo Salgado
We focus on the analysis of three inequivalent equations of state of geometric dark energy in cosmology that have been considered in the past and discuss their differences,…
About matter and dark-energy domination eras in R^n gravity or lack thereof
Luisa G. Jaime, Leonardo Patiño, Marcelo Salgado
We provide further numerical evidence which shows that R^n models in f(R) metric gravity whether produces a late time acceleration in the Universe or a matter domination era (usual…
Cosmology in f(R) exponential gravity
Luisa Jaime, Marcelo Salgado, Leonardo Patino
Using an approach that treats the Ricci scalar itself as a degree of freedom, we analyze the cosmological evolution within an f(R) model that has been proposed recently (exponentia…
Regions of Dynamical Stability for Discs and Planets in Binary Stars of the Solar Neighborhood
Luisa G. Jaime, Barbara Pichardo, Luis Aguilar
Using the results of Pichardo \et (2005,2008), we determine regions of dynamical stability where planets (or discs in general) could survive in stable orbits around binary stellar…
f(R) Cosmology revisited
Luisa G. Jaime, Leonardo Patino, Marcelo Salgado
We consider a class of metric f(R) modified gravity theories, analyze them in the context of a Friedmann-Robertson-Walker cosmology and confront the results with some of the known…
Robust approach to f(R) gravity
Luisa G. Jaime, Leonardo Patino, Marcelo Salgado
We consider metric f(R) theories of gravity without mapping them to their scalar-tensor counterpart, but using the Ricci scalar itself as an "extra" degree of freedom. This approac…