5 papers
A microphysically inspired approach to dark matter-dark energy interactions: first bounds on dark-sector scattering cross sections
A. A. Escobal, F. B. Abdalla, J. F. Jesus +4
The observational tension regarding the value of the Hubble constant () has motivated the exploration of alternative cosmological scenarios, including Interacting Dark Energy…
Linear Growth of Matter Perturbations Probed by Redshift-Space Distortions in Interacting CDM Cosmologies
A. A. Escobal, H. A. P. Macedo, J. F. Jesus +2
In the context of a spatially flat CDM cosmology, we investigate interacting dark energy (IDE) scenarios characterized by phenomenological interaction terms proportional to…
Kinematic Reconstruction of CDM Models
P. A. S. Guillen, J. F. Jesus, R. Valentim
In this work, we have \textbf{analysed} two kinematic parametrizations for CDM models, namely, the linear expansions and , where is the…
Revisiting the two-body problem in Yukawa gravity and in a gravitational extension of the Buckingham potential
E. A. Gallegos, R. Perca Gonzales, J. F. Jesus
We revisit the Keplerian-like parametrization of the two-body problem in Yukawa gravity studied in the literature. Some inconsistencies, which spoil Bertrand's theorem, observed in…
New accelerating cosmology without dark energy: The particle creation approach and the reduced relativistic gas
P. W. R. Lima, J. A. S. Lima, J. F. Jesus
The standard procedure to explain the accelerated expansion of the Universe is to assume the existence of an exotic component with negative pressure, generically called dark energy…