7 papers
Investigating a Possible Variation of the Gravitational Constant Through Gas Mass Fraction Measurements and Type Ia Supernovae Observations
L. R. Colaço, R. F. L. Holanda, Marcelo Ferreira
In this paper, we investigate a possible time variation of the gravitational constant (G) using a non-parametric approach. Our main cosmological probe is the gas mass fraction of g…
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…
Probing the Cosmic Distance Duality Relation via Non-Parametric Reconstruction for High Redshifts
Felipe Avila, Fernanda Oliveira, Camila Franco +4
We test the validity of the cosmic distance duality relation (CDDR) by combining angular diameter distance and luminosity distance measurements from recent cosmological observation…
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…
Revisiting the temperature evolution law of the CMB with gaussian processes
Felipe Avila, Alexander Bonilla Rivera, Rafael C. Nunes +2
In this work, we perform a statistical inference of the classical background law governing the evolution of the temperature of the cosmic microwave background radiation (CMB), give…
Observational bounds on a possible electron-to-proton mass ratio variation and constraints in the lepton-specific 2HDM
R. G. Albuquerque, R. F. L. Holanda, I. E. T. R. Mendonça +1
In this work, we test a possible redshift variation of the electron-to-proton mass ratio, , directly from galaxy cluster gas mass fraction measurements and type Ia sup…