5 papers · 1 filter
Revisiting the Constancy of the Speed of Light: Galaxy Cluster Mass Bias Implications
R. F. L. Holanda, Marcelo Ferreira, Javier E. Gonzalez +1
In recent years, improvements in galaxy cluster observations have enabled a variety of tests of fundamental physics using these systems. In this work, we test the constancy of the…
Observational constraints on the product of dark energy chemical potential and number density in out-of-equilibrium models
J. M. Costa Netto, Javier E. Gonzalez, H. H. B. Silva
In this work, we impose observational limits on the product of dark energy chemical potential, , and number density, , at the present time in out-of-equilibrium models, cons…
An investigation of a varying G through Strong Lensing and SNe Ia observations
R. F. L. Holanda, M. Ferreira, Javier E. Gonzalez
In this paper, we analyze the potential variation of the gravitational constant using data from strong gravitational lensing systems and Type Ia supernovae. Testing para…
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…
Unveiling the Hubble Constant through Galaxy Cluster Gas Mass Fractions
Javier E. Gonzalez, Marcelo Ferreira, Leorando R. Colaço +2
In this work, we obtain Hubble constant () estimates by using two galaxy cluster gas mass fraction measurement samples, Type Ia supernovae luminosity distances, and the validi…