Universidade Estadual da Paraíba

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20032026

most citedKlein-Gordon Oscillator in Kaluza-Klein Theory

139 citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

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26 papers · 1 filter

astro-ph.CO2026

The BINGO project X. Cosmological parameter constraints from HI Intensity Mapping lognormal simulations

Pablo Motta, Filipe B. Abdalla, Camila P. Novaes +12

Context. Building on the transformative success of optical redshift surveys, the emerging technique of neutral hydrogen (HI) intensity mapping (IM) offers a novel probe of large-sc…

astro-ph.CO2025

Machine learning analysis of Photometric data from the Dark Energy Survey

Elcio Abdalla, Filipe B. Abdalla, Alessandro Marins +3

In order to retrieve cosmological parameters from photometric surveys, we need to estimate the distribution of the photometric redshift in the sky with excellent accuracy. We use a…

astro-ph.CO2024

Constraining tachyonic inflationary β-exponential model with Continuous Spontaneous Localization collapse scheme

F. A. Brito, Julio C. M. Rocha, A. S. Lemos +1

In this work, we consider the dynamics of the self-induced collapse of the tachyon wave function in inflationary scenarios. We analyze the modifications on the power spectrum by co…

astro-ph.CO2023★ 14 cited

Constraints on interacting dark energy revisited: implications for the Hubble tension

Gabriel A. Hoerning, Ricardo G. Landim, Luiza O. Ponte +3

We revisit a class of coupled dark energy models where dark energy interacts with dark matter via phenomenological energy exchange terms. We include the perturbation of the Hubble…

astro-ph.CO2022★ 12 cited

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…

astro-ph.CO2020★ 3 cited

Twinlike models for parametrized dark energy

J. D. Dantas, J. J. Rodrigues

We study cosmological models involving a single real scalar field that has an equation of state parameter which evolves with cosmic time. We highlight some common parametrizations…

astro-ph.CO2017★ 11 cited

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, $α$ , for a class of runaway dilaton models are performed. By considering a possible evolution with…

astro-ph.CO2016★ 26 cited

Searching for deviations from the General Relativity Theory with gas mass fraction of galaxy clusters and complementary probes

R. F. L. Holanda, S. H. Pereira, S. Santos-da-Costa

Nowadays, thanks to the improved precision of cosmological data, it has been possible to search for deviation from the general relativity theory with tests on large cosmic scales.…

astro-ph.CO2016★ 50 cited

Probing the distance-duality relation with high- $z$ data

R. F. L. Holanda, V. C. Busti, F. S. Lima +1

Measurements of strong gravitational lensing jointly with type Ia supernovae (SNe Ia) observations have been used to test the validity of the cosmic distance duality relation (CDDR…

astro-ph.CO2016★ 15 cited

Can galaxy clusters, type Ia supernovae and cosmic microwave background rule out a class of modified gravity theories?

R. F. L. Holanda, S. H. Pereira

In this paper we study cosmological signatures of modified gravity theories that can be written as a coupling between a extra scalar field and the electromagnetic part of the usual…

astro-ph.CO2016★ 25 cited

Searching for cosmological signatures of the Einstein equivalence principle breaking

R. F. L. Holanda, K. N. N. O. Barros

Modifications of gravity generated by a multiplicative coupling of a scalar field to the electromagnetic Lagrangian lead to a breaking of Einstein equivalence principle (EEPB) as w…

astro-ph.CO2016★ 3 cited

The robustness of angular diameter distances to the lens in the B1608+656 and RXJ1131-1231 systems

R. F. L. Holanda

The angular diameter distance of lens, $D_{A o l}$ , of strong gravitational lensing systems has been claimed as a cosmic standard ruler. The first measurements for this distance were…

astro-ph.CO2016★ 20 cited

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…

astro-ph.CO2015★ 56 cited

Probing the cosmic distance duality with strong gravitational lensing and supernovae Ia data

R. F. L. Holanda, V. C. Busti, J. S. Alcaniz

We propose and perform a new test of the cosmic distance-duality relation (CDDR), $D_{L} (z) / D_{A} (z) (1 + z)^{2} = 1$ , where $D_{A}$ is the angular diameter distance and $D_{L}$ is the l…

astro-ph.CO2015★ 22 cited

Constraints on a possible variation of the fine structure constant from galaxy cluster data

R. F. L. Holanda, S. J. Landau, J. S. Alcaniz +2

We propose a new method to probe a possible time evolution of the fine structure constant $α$ from X-ray and Sunyaev-Zeldovich measurements of the gas mass fraction ( $f_{g a s}$ ) in…

astro-ph.CO2015★ 75 cited

Two new tests to the distance duality relation with galaxy clusters

S. Santos-da-Costa, V. C. Busti, R. F. L. Holanda

The cosmic distance duality relation is a milestone of cosmology involving the luminosity and angular diameter distances. Any departure of the relation points to new physics or sys…

astro-ph.CO2014★ 11 cited

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), $d_{L} (z) (1 + z)^{2} / d_{A} (z) = η$ , where $η = 1$ and $d_{L} (z)$ and $d_{A} (z)$ are, respectively, the luminosity and the angular diameter di…

astro-ph.CO2014★ 10 cited

Robustness of $H_{0}$ determination at intermediate redshifts

R. F. L. Holanda, V. C. Busti, G. Pordeus da Silva

The most recent Hubble constant ( $H_{0})$ estimates from local methods (z << 1), $H_{0} = 73.8 \pm 2.4$ km s $^{- 1}$ Mpc $^{- 1}$ , and the one from high redshifts $H_{0} = 67.3 \pm 1.2$ km s$^{-1…

astro-ph.CO2014★ 7 cited

Cosmological constraints on galaxy cluster structure

R. F. L. Holanda, J. S. Alcaniz

Observations of galaxy clusters (GC's) are a powerful tool to probe the evolution of the Universe at $z < 2$ . However, the determination of their real shape and structure is not comp…

astro-ph.CO2014★ 41 cited

Probing cosmic opacity at high redshifts with gamma-ray bursts

R. F. L. Holanda, V. C. Busti

Probing the evolution of the universe at high redshifts with standard candles is a powerful way to discriminate dark energy models, where an open question nowadays is whether this…

astro-ph.CO2013★ 13 cited

Supernovae as probes of cosmic parameters: estimating the bias from under-dense lines of sight

V. C. Busti, R. F. L. Holanda, C. Clarkson

Correctly interpreting observations of sources such as type Ia supernovae (SNe Ia) require knowledge of the power spectrum of matter on AU scales - which is very hard to model accu…

astro-ph.CO2013★ 9 cited

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…

astro-ph.CO2013★ 5 cited

Complementary cosmological tests of RSII brane models

R. F. L. Holanda, J. W. C. Silva, F. Dahia

In this paper we explore observational bounds on flat and non-flat cosmological models in Type II Randall-Sundrum (RSII) branes. In a first analysis, we consider current measuremen…