119 citations · 469 across the 16 of their papers we have counts for
16 papers
Cosmological model-independent constraints on the baryon fraction in the IGM from fast radio bursts and supernovae data
Thais Lemos, Rodrigo S. Gonçalves, Joel C. Carvalho +1
Fast Radio Bursts (FRBs) are millisecond-duration radio transients with an observed dispersion measure () greater than the expected Milky Way contribution, which suggests that…
The angular scale of homogeneity with SDSS-IV DR16 Luminous Red Galaxies
Uendert Andrade, Rodrigo S. Gonçalves, Gabriela C. Carvalho +3
We report measurements of the angular scale of cosmic homogeneity () using the recently released luminous red galaxy sample of the sixteenth data release of the Sloan Digita…
Measuring the cosmic homogeneity scale with SDSS-IV DR16 Quasars
Rodrigo S. Gonçalves, Gabriela C. Carvalho, Uendert Andrade +3
We report measurements of the scale of cosmic homogeneity () using the recently released quasar sample of the sixteenth data release of the Sloan Digital Sky Survey (SDSS-IV…
The miniJPAS survey: a preview of the Universe in 56 colours
S. Bonoli, A. Marín-Franch, J. Varela +166
The Javalambre-Physics of the Accelerating Universe Astrophysical Survey (J-PAS) will soon start to scan thousands of square degrees of the northern extragalactic sky with a unique…
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…
Cosmic homogeneity: a spectroscopic and model-independent measurement
R. S. Gonçalves, G. C. Carvalho, C. A. P. Bengaly +4
Cosmology relies on the Cosmological Principle, i.e., the hypothesis that the Universe is homogeneous and isotropic on large scales. This implies in particular that the counts of g…
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…
On the origin of the CDDR violation
R. S. Gonçalves
The investigation of any violation in the Cosmic Distance Duality Relation (CDDR) is one of the most important sources of investigation for a new physic. In this paper we propose a…
A low- test for interacting dark energy
R. S. Goncalves, G. C. Carvalho, J. S. Alcaniz
A non-minimal coupling between the dark matter and dark energy components may offer a way of solving the so-called coincidence problem. In this paper we propose a low- test for…
Constraints on the duality relation from ACT cluster data
R. S. Gonçalves, A. Bernui, R. F. L. Holanda +1
The cosmic distance-duality relation (CDDR), , where and and are, respectively, the luminosity and the angular diameter di…
General treatment for dark energy thermodynamics
H. H. B. Silva, R. Silva, R. S. Gonçalves +2
In this work we discuss a general approach for the dark energy thermodynamics considering a varying equation of state (EoS) parameter of the type and taking into ac…
Forecasting constraints on the cosmic duality relation with galaxy clusters
R. S. Goncalves, J. S. Alcaniz, J. C. Carvalho +1
One of the fundamental hypotheses in observational cosmology is the validity of the so-called cosmic distance-duality relation (CDDR). In this paper, we perform Monte Carlo simulat…
A test for cosmic distance duality
R. F. L. Holanda, R. S. Goncalves, J. S. Alcaniz
Testing the cosmic distance duality relation (CDDR) constitutes an important task for cosmology and fundamental physics since any violation of it would be a clear evidence of new p…
Testing the cosmic distance duality with X-ray gas mass fraction and supernovae data
R. S. Goncalves, R. F. L. Holanda, J. S. Alcaniz
In this paper we discuss a new cosmological model-independent test for the cosmic distance duality relation (CDDR), , where and $D_{L}(…
Thermodynamics and dark energy
R. Silva, R. S. Goncalves, J. S. Alcaniz +1
A significant observational effort has been directed to unveil the nature of the so-called dark energy. However, given the large number of theoretical possibilities, it is possible…
Constraining dark matter-dark energy interaction with gas mass fraction in galaxy clusters
R. S. Goncalves, J. S. Alcaniz, A. Dev +1
The recent observational evidence for the current cosmic acceleration have stimulated renewed interest in alternative cosmologies, such as scenarios with interaction in the dark se…