23 citations · 96 across the 9 of their papers we have counts for
9 papers
A Joint Analysis of Strong Lensing and Type Ia Supernovae to Determine the Hubble Constant
L. R. Colaço, R. F. L. Holanda, Z. C. Santana +1
We present a cosmological model-independent determination of the Hubble constant, , by combining time-delay measurements from seven TDCOSMO systems, Einstein radius measuremen…
A Hubble Constant Determination Through Quasar Time Delays and Type Ia Supernovae
L. R. Colaço
This paper presents a new model-independent constraint on the Hubble constant () by anchoring relative distances from Type Ia supernovae (SNe Ia) observations to absolute dist…
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…
Gravitational lens time-delay as a probe of a possible time variation of the fine-structure constant
L. R. Colaço, J. E. Gonzalez, R. F. L. Holanda
A new method based on large-scale structure observations is proposed to probe a possible time variation of the fine-structure constant (). Our analyses are based on time-delay o…
Probing variation of the fine-structure constant in runaway dilaton models using Strong Gravitational Lensing and Type Ia Supernovae
L. R. Colaço, R. F. L. Holanda, R. Silva
In order to probe a possible time variation of the fine-structure constant (), we propose a new method based on Strong Gravitational Lensing and Type Ia Supernovae observations.…
Galaxy clusters and a possible variation of the fine structure constant
L. R. Colaço, R. F. L. Holanda, R. Silva +1
Galaxy clusters have been used as a cosmic laboratory to verify a possible time variation of fundamental constants. Particularly, it has been shown that the ratio $Y_{SZ}D_{A}^{2}/…
Limits on evolution of the fine-structure constant in runaway dilaton models from Sunyaev-Zeldovich Observations
R. F. L. Holanda, L. R. Colaço, R. S. Gonçalves +1
In this paper, new bounds on possible variations of the fine structure constant, , for a class of runaway dilaton models are performed. By considering a possible evolution with…
Testing the cosmic conservation of photon number with type Ia supernovae and ages of old objects
J. F. Jesus, R. F. L. Holanda, M. A. Dantas
In this paper, we obtain luminosity distances by using ages of 32 old passive galaxies distributed over the redshift interval and test the cosmic conservation of…