66 citations · 597 across the 33 of their papers we have counts for
12 papers · 1 filter
Unveiling the internal structure of Hercules supercluster
R. Monteiro-Oliveira, D. F. Morell, V. M. Sampaio +2
We have investigated the structure of the Hercules supercluster (SCL160) based on data originally extracted from the Sloan Digital Sky Survey SDSS-DR7. We have traced the mass dist…
Reliable Photometric Membership (RPM) of Galaxies in Clusters. I. A Machine Learning Method and its Performance in the Local Universe
P. A. A. Lopes, A. L. B. Ribeiro
We introduce a new method to determine galaxy cluster membership based solely on photometric properties. We adopt a machine learning approach to recover a cluster membership probab…
The merger history of the complex cluster Abell 1758: a combined weak lensing and spectroscopic view
Rogério Monteiro-Oliveira, Eduardo S. Cypriano, Rubens E. G. Machado +4
We present a weak-lensing and dynamical study of the complex cluster Abell 1758 (A1758, z = 0.278) supported by hydrodynamical simulations. This cluster is composed of two main str…
Stochastic quintessence models: jerk and fine-structure variability constraints
Christine C. Dantas, Andre L. B. Ribeiro
We report on constraints to the cosmological jerk parameter () and to possible variability of the fine-structure constant () based on stochastic quintessence models of dar…
NoSOCS in SDSS III - The interplay between galaxy evolution and the dynamical state of galaxy clusters
Andre Ribeiro, Paulo Lopes, Sandro Rembold
We investigate relations between the color and luminosity distributions of cluster galaxies and the evolutionary state of their host clusters. Our aim is to explore some aspects of…
SPIDER IX - Classifying Galaxy Groups according to their Velocity Distribution
A. L. B. Ribeiro, A. C. Schilling, R. R. de Carvalho +4
We introduce a new method to study the velocity distribution of galaxy systems, the Hellinger Distance (HD) - designed for detecting departures from a Gaussian velocity distributio…