3 papers
astro-ph.CO2026
Tracing the Evolution of over the Last 10 Billion Years with Non-parametric Methods
R. F. L. Holanda, J. F. Jesus, Z. C. Santana +1
We investigate the redshift evolution of the matter density parameter, , using galaxy cluster gas mass fraction measurements combined with cosmic chronometer data a…
astro-ph.CO2025
High-redshift cosmography with a possible cosmic distance duality relation violation
José F. Jesus, Mikael J. S. Gomes, Rodrigo F. L. Holanda +1
In this study, we used geometric distances at high redshifts (both luminosity and angular) to perform a cosmographic analysis with the Padé method, which stabilizes the behaviour…
astro-ph.CO2024
Non-parametric reconstruction of the fine structure constant with galaxy clusters
Marcelo Ferreira, Rodrigo F. L. Holanda, Javier E. Gonzalez +2
Testing possible variations in fundamental constants of nature is a crucial endeavor in observational cosmology. This paper investigates potential cosmological variations in the fi…