26 citations · 223 across the 30 of their papers we have counts for
4 papers · 2 filters
Variation in the fine-structure constant, distance-duality relation and the next generation of high-resolution spectrograph
Rodrigo S. Gonçalves, Susana Landau, Jailson S. Alcaniz +1
The possibility of variation of the fundamental constants of nature has been a long-standing question, with important consequences for fundamental physics and cosmology. In particu…
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…
An estimate of the dark matter density from galaxy clusters and supernovae data
R. F. L. Holanda, R. S. Gonçalves, J. E. Gonzales +1
In this paper, we discuss a model-independent way to obtain the present dark matter density parameter () by combining gas mass fraction measurements in galaxy cluster…
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}/…