Instituto de Ciências Ambientais, Químicas e Farmacêuticas

output

20152021

most citedGaussian Process Estimation of Transition Redshift

77 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.

collaborating institutions

8 papers

astro-ph.HE2021★ 5 cited

Fast Radio Bursts as crustal dynamical events induced by magnetic field evolution in young magnetars

J. E. Horvath, P. H. R. S. Moraes, M. G. B. de Avellar +1

We revisit in this work a model for repeating Fast Radio Bursts based of the release of energy provoked by the magnetic field dynamics affecting a magnetar's crust. We address the…

astro-ph.HE2020

Redback/Black Widow Systems as progenitors of the highest neutron star masses and low-mass Black Holes

J. E. Horvath, A. Bernardo, L. S. Rocha +3

We suggest in this note that "spider" systems are the naturally expected progenitors of the highest neutron star masses, and possibly low-mass black holes, based on their long-term…

astro-ph.CO2019★ 77 cited

Gaussian Process Estimation of Transition Redshift

J. F. Jesus, R. Valentim, A. A. Escobal +1

This paper aims to put constraints on the transition redshift $z_{t}$ , which determines the onset of cosmic acceleration, in cosmological-model independent frameworks. In order to do…

astro-ph.CO2019★ 22 cited

Kinematic Constraints on Spatial Curvature from Supernovae Ia and Cosmic Chronometers

J. F. Jesus, R. Valentim, P. H. R. S. Moraes +1

An approach to estimate the spatial curvature $Ω_{k}$ from data independently of dynamical models is suggested, through kinematic parameterizations of the comoving distance ($D_{C}(z…

gr-qc2019★ 2 cited

Thermodynamic constraints on matter creation models

R. Valentim, J. F. Jesus

Entropy is a fundamental concept from Thermodynamics and it can be used to study models on context of Creation Cold Dark Matter (CCDM). From conditions on the first ( $S ˙ \geq 0$ …

astro-ph.CO2017★ 20 cited

Bayesian correction of $H (z)$ data uncertainties

J. F. Jesus, T. M. Gregório, F. Andrade-Oliveira +2

We compile 41 $H (z)$ data from literature and use them to constrain O $Λ$ CDM and flat $Λ$ CDM parameters. We show that the available $H (z)$ suffers from uncertainties overestimation…

astro-ph.CO2016★ 15 cited

Bayesian analysis of CCDM Models

J. F. Jesus, R. Valentim, F. Andrade-Oliveira

Creation of Cold Dark Matter (CCDM), in the context of Einstein Field Equations, leads to negative creation pressure, which can be used to explain the accelerated expansion of the…

cond-mat.mtrl-sci2015★ 15 cited

Structural studies of mesoporous ZrO $_{2}$ -CeO $_{2}$ and ZrO $_{2}$ -CeO $_{2}$ /SiO $_{2}$ mixed oxides for catalytical applications

R. Bacani, T. S. Martins, D. G. Lamas +1

In this work the synthesis of ZrO $_{2}$ -CeO $_{2}$ and ZrO $_{2}$ -CeO $_{2}$ /SiO $_{2}$ were developed, based on the process to form ordered mesoporous materials such as SBA-15 silica.…