100 citations · 498 across the 24 of their papers we have counts for
24 papers
Dark energy from neutrino interactions in Unimodular Gravity
Alejandro Gil-Ocaranza, Josue De-Santiago, Mauricio Lopez-Hernandez +1
We investigate a dark energy scenario generated by neutrino interactions mediated by a light scalar field, in which finite-temperature corrections induce an effective neutrino mass…
Comparing Hemispheres: Anisotropy in the deceleration parameter
Mauricio Lopez-Hernandez, Josue De-Santiago
We present a hemispherical comparison analysis of the deceleration parameter using the Pantheon+ sample of Type Ia supernovae to test the isotropy of cosmic acceleration and…
Towards a complete scheme of cosmological neutrino self-interactions: Collision term for a wide range of mediator masses
Ivan Pérez-Castro, Josue De-Santiago, Gabriela Garcia-Arroyo +2
Neutrino self-interactions (NSI) offer a potential pathway to address anomalies in standard cosmology and explain existing cosmological tensions. In this work, we present a novel f…
From Dark Radiation to Dark Energy: Unified Cosmological Evolution in K-essence Models
Eladio Moreno, Josue De-Santiago
We study a class of Unified Dark Matter (UDM) models based on generalized K-essence, where a single scalar field with non-canonical kinetic terms accounts for dark radiation, dark…
Lya2pcf: an efficient pipeline to estimate two- and three-point correlation functions of the Lyman- forest
Josue De-Santiago, Rafael Gutiérrez-Balboa, Gustavo Niz +1
Studying the matter distribution in the universe through the Lyman- forest allows us to constrain small-scale physics in the high-redshift regime. Spectroscopic quasar surveys a…
Resonant neutrino self-interactions: Insights from the full shape galaxy power spectrum
Hernán E. Noriega, Josue De-Santiago, Gabriela Garcia-Arroyo +2
This paper investigates resonant neutrino self-interactions in cosmology by employing, for the first time, the effective field theory of large-scale structure to model their impact…
Redshift Assessment Infrastructure Layers (RAIL): Rubin-era photometric redshift stress-testing and at-scale production
The RAIL Team, Jan Luca van den Busch, Eric Charles +31
Virtually all extragalactic use cases of the Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST) require the use of galaxy redshift information, yet the vast majorit…
Is there a dynamical tendency in H0 with late time measurements?
Mauricio Lopez-Hernandez, Josue De-Santiago
The discrepancy between the Hubble constant values derived from early-time and late-time measurements, reaching up to , represents the most serious challenge in modern co…
Resonant neutrino self-interactions and the tension
Jorge Venzor, Gabriela Garcia-Arroyo, Josue De-Santiago +1
In this work, we study the previously unexplored resonant region of neutrino self-interactions. Current disagreement on late and early time observations of the Universe expansion c…
Massive neutrino self-interactions with a light mediator in cosmology
Jorge Venzor, Gabriela Garcia-Arroyo, Abdel Pérez-Lorenzana +1
Nonstandard self-interactions can alter the evolution of cosmological neutrinos, mainly by damping free streaming, which should leave traces in cosmological observables. Although o…
Bounds on neutrino-scalar nonstandard interactions from big bang nucleosynthesis
Jorge Venzor, Abdel Pérez-Lorenzana, Josue De-Santiago
Coherent forward scattering processes by neutrino-scalar nonstandard interactions (SNSI) induce an effective neutrino mass. In the Early Universe, a large neutrino effective mass r…
Relativistic and non-Gaussianity contributions to the one-loop power spectrum
Rebeca Martinez-Carrillo, Josue De-Santiago, Juan Carlos Hidalgo +1
We compute the one-loop density power spectrum including Newtonian and relativistic contributions, as well as the primordial non-Gaussianity contributions from and $g_…
Nonlinear evolution of initially biased tracers in modified gravity
Alejandro Aviles, Mario Alberto Rodriguez-Meza, Josue De-Santiago +1
In this work we extend the perturbation theory for modified gravity (MG) in two main aspects. First, the construction of matter overdensities from Lagrangian displacement fields is…
Theoretical and observational constraints on Tachyon Inflation
Nandinii Barbosa-Cendejas, Josue De-Santiago, Gabriel German +2
We constrain several models in Tachyonic Inflation derived from the large- formalism by considering theoretical aspects as well as the latest observational data. On the theoreti…
Non-linear coupling in the dark sector as a running vacuum model
Josue De-Santiago, Iván E. Sánchez G., David Tamayo
In this work we study a phenomenological non-gravitational interaction between dark matter and dark energy. The scenario studied in this work extends the usual interaction model pr…
Tachyon inflation in the Large- formalism
Nandinii Barbosa-Cendejas, Josue De-Santiago, Gabriel German +2
We study tachyon inflation within the large- formalism, which takes a prescription for the small Hubble flow slow--roll parameter as a function of the large number of -…
Phase space analysis of the F (X) - V (ϕ) scalar field Lagrangian and scaling solutions in flat cosmology
Josue De-Santiago, Jorge L. Cervantes-Cota
We review a system of autonomous differential equations developed in our previous work [1] describing a flat cosmology filled with a barotropic fluid and a scalar field with a modi…
Probing two approaches to Unified Dark Dynamics
Jorge L. Cervantes-Cota, Alejandro Aviles, Josue De-Santiago
Dark matter and dark energy are essential in the description of the late Universe, since at least the epoch of equality. On the other hand, the inflation is also necessary and dema…
Cosmological constraints on a decomposed Chaplygin gas
Yuting Wang, David Wands, Lixin Xu +2
Any unified dark matter cosmology can be decomposed into dark matter interacting with vacuum energy, without introducing any additional degrees of freedom. We present observational…
Inhomogeneous and interacting vacuum energy
Josue De-Santiago, David Wands, Yuting Wang
Vacuum energy is a simple model for dark energy driving an accelerated expansion of the universe. If the vacuum energy is inhomogeneous in spacetime then it must be interacting. We…
On the dynamics of unified k-essence cosmologies
Josue De-Santiago, Jorge L. Cervantes-Cota
We analyze the phase space of a particular unified model of dark matter, dark energy, and inflation that we recently studied in [Phys. Rev. D 83, 063502 (2011)] whose Lagrangian is…
Inhomogeneous vacuum energy
David Wands, Josue De-Santiago, Yuting Wang
Vacuum energy remains the simplest model of dark energy which could drive the accelerated expansion of the Universe without necessarily introducing any new degrees of freedom. Inho…
Cosmological phase space analysis of the F (X) - V (phi) scalar field and bouncing solutions
Josue De-Santiago, Jorge L. Cervantes-Cota, David Wands
We analyze the dynamical system defined by a universe filled with a barotropic fluid plus a scalar field with modified kinetic term of the form L = F (X) - V (phi). After a suitabl…
Generalizing a Unified Model of Dark Matter, Dark Energy, and Inflation with Non Canonical Kinetic Term
Josue De-Santiago, Jorge L. Cervantes-Cota
We study a unification model for dark energy, dark matter, and inflation with a single scalar field with non canonical kinetic term. In this model the kinetic term of the Lagrangia…