18 papers
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…
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…
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…
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…
Do equation of state parametrizations of dark energy faithfully capture the dynamics of the late universe?
Ãzgür 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…