21 citations · 55 across the 4 of their papers we have counts for
4 papers · 1 filter
A Hubble Constant Estimate from Galaxy Cluster and type Ia SNe Observations
L. R. Colaço, M. S. Ferreira, R. F. L. Holanda +2
In this work, we constrain the Hubble constant parameter, , using a combination of the Pantheon sample and galaxy clusters (GC) measurements from minimal cosmological assumpti…
Constraining a possible time-variation of the speed of light along with the fine-structure constant using strong gravitational lensing and Type Ia supernovae observations
L. R. Colaço, S. J. Landau, J. E. Gonzalez +2
The possible time variation of the fundamental constants of nature has been an active subject of research since the large-number hypothesis was proposed by Dirac. In this paper, we…
Galaxy cluster Sunyaev-Zel'dovich effect scaling-relation and type Ia supernova observations as a test for the cosmic distance duality relation
R. F. L. Holanda, L. R. Colaço, S. H. Pereira +1
In this paper, we propose a new test to the cosmic distance duality relation (CDDR), , where and are the luminosity and angular diameter distances, resp…
Galaxy clusters, type Ia supernovae and the fine structure constant
R. F. L. Holanda, V. C. Busti, L. R. Colaço +2
As is well known, measurements of the Sunyaev-Zeldovich effect can be combined with observations of the X-ray surface brightness of galaxy clusters to estimate the angular diameter…