93 citations · 215 across the 10 of their papers we have counts for
10 papers
Abundance analysis of APOGEE spectra for 58 metal-poor stars from the bulge spheroid
R. Razera, B. Barbuy, T. C. Moura +19
The central part of the Galaxy host a multitude of stellar populations, including the spheroidal bulge stars, stars moved to the bulge through secular evolution of the bar, inner h…
Gemini/Phoenix H-band analysis of the globular cluster AL3
B. Barbuy, H. Ernandes, S. O. Souza +9
The globular cluster AL~3 is old and located in the inner bulge. Three individual stars were observed with the Phoenix spectrograph at the Gemini South telescope. The wavelength re…
Stellar Population Properties of ETGs in Compact Groups of Galaxies
Tatiana C. Moura, Reinaldo R. de Carvalho, Sandro B. Rembold +6
We present results on the study of the stellar population in Early-Type galaxies (ETGs) belonging to 151 Compact Groups (CGs). We also selected a field sample composed of 846 ETGs…
Integrated Spectra of Milky Way Globular Cluster
Tatiana Coelho de Moura, Marina Trevisan, Beatriz Barbuy +1
Integrated spectra of Milky Way globular clusters (GCs) are reproduced by computing synthetic spectra taking into account individual element abundances. Five clusters were selected…
The Mass Density Profile and Star Formation History of Gaussian and Non-Gaussian Clusters
R. R. de Carvalho, A. P. Costa, T. C. Moura +1
This paper is the third of a series in which we investigate the discrimination between Gaussian (G) and Non-Gaussian (NG) clusters, based on the velocity distribution of the member…
Machine and Deep Learning Applied to Galaxy Morphology -- A Comparative Study
P. H. Barchi, R. R. de Carvalho, R. R. Rosa +7
Morphological classification is a key piece of information to define samples of galaxies aiming to study the large-scale structure of the universe. In essence, the challenge is to…
Gradient Pattern Analysis Applied to Galaxy Morphology
Reinaldo. R. Rosa, Reinaldo. R. de Carvalho, Rubens. A. Sautter +6
Gradient pattern analysis (GPA) is a well-established technique for measuring gradient bilateral asymmetries of a square numerical lattice. This paper introduces an improved versio…
Bayesian surface photometry analysis for early-type galaxies
D. H. Stalder, Reinaldo R. de Carvalho, Martin D. Weinberg +4
We explore the application of Bayesian image analysis to infer the properties of an SDSS early-type galaxy sample including AGN. We use GALPHAT (Yoon et al. 2010) with a Bayes-fact…
Investigating the Relation between Galaxy Properties and the Gaussianity of the Velocity Distribution of Groups and Clusters
R. R. de Carvalho, A. L. B. Ribeiro, D. Stalder +3
We investigate the dependence of stellar population properties of galaxies on group dynamical stage for a subsample of Yang catalog. We classify groups according to their galaxy ve…
Improving galaxy morphology with machine learning
P. H. Barchi, F. G. da Costa, R. Sautter +4
This paper presents machine learning experiments performed over results of galaxy classification into elliptical (E) and spiral (S) with morphological parameters: concetration (CN)…