299 citations · 982 across the 27 of their papers we have counts for
8 papers · 1 filter
Testing Matter Diffusion with Late-Time Cosmological Observations
Alireza Zafari, Mohammad-Hossein Namdar, Luis A. Escamilla +1
We investigate a class of late-time cosmological models derived from the phenomenological framework of variable matter diffusion. In these scenarios, energy-momentum conservation r…
Modifying CDM dynamics via out-of-equilibrium axions: reconciling SH0ES and DESI values
Giovanni Montani, Luis A. Escamilla, Nakia Carlevaro +1
We investigate late-Universe dynamics in which the dark matter component is described by axion particles. The proposed framework departs from the standard CDM paradigm due to a…
Hubble tension: the shape wall
Miguel A. Sabogal, Luis A. Escamilla, Davide Pedrotti +2
The standard "no-go theorem" against late-time solutions to the Hubble tension is essentially a normalization wall, since Baryon Acoustic Oscillation (BAO) measurements constrain t…
Reconstructing dark energy with fewer assumptions
Daniel A. Kessler, Eleonora Di Valentino, Luis A. Escamilla +1
We perform minimalistic reconstructions of the dark energy density and equation of state using late-time distance measurements. Our methodology avoids assumptions that correlate th…
Do equation of state parametrizations of dark energy faithfully capture the dynamics of the late universe?
Özgür Akarsu, Maria Caruana, Konstantinos F. Dialektopoulos +3
We investigate how strongly late-time inferences about DE dynamics depend on the functional prior used to represent the expansion history. Using identical late-time combinations of…
Dark Energy with Constant Inertial Mass Density: Updated Constraints and Curvature-Induced Sign Transitions in and
Luis A. Escamilla, Berat Karadavut, Nihan Katırcı
We present updated observational constraints on the simple-gDE model, characterized by a constant inertial mass density (IMD) ,which belongs to the broader g…
Hints of sign-changing scalar field energy density and a transient acceleration phase at from model-agnostic reconstructions
Özgür Akarsu, Maria Caruana, Konstantinos F. Dialektopoulos +3
We present a data-driven reconstruction of the late-time expansion history and its implications for dark-energy dynamics. Modeling the reduced Hubble rate with a node-based Gaussia…
Revisiting the Matter Creation Process: Observational Constraints on Gravitationally Induced Dark Energy and the Hubble Tension
Tiziano Schiavone, Mariaveronica De Angelis, Luis A. Escamilla +2
The Hubble tension and the unknown origin of dark energy motivate the exploration of alternative mechanisms for late-time cosmic acceleration. We investigate gravitationally induce…