5 papers
Optical Spectroscopy of the Central Regions of Bright Barred Spiral Galaxies
J. A. Garcia-Barreto, H. Aceves, O. Kuhn +3
Optical red spectra of a set of 18 bright barred spiral galaxies are presented. The study is aimed at determining the local kinematics, and the physical conditions of ionized gas i…
A Numerical Experiment of a Triple Merger of Spirals
Hector Aceves
We present a preliminary report on the dynamical evolution of triplets of spiral galaxies that lead to merger remnants that resemble an elliptical. We find that large projected ste…
Triplets of Galaxies: Some Dynamical Aspects
Hector Aceves
We present a study of the dynamics of triplets of galaxies. In particular we focus on properties that are directly comparable with observations: e.g., velocity dispersion, mean har…
On two mass estimators for clusters of galaxies
H. Aceves, J. Perea
The two most common mass estimators that use velocity dispersions and positions of objects in a stellar system, the virial mass estimator (VME) and the projected mass estimator (PM…
Estimating Masses in Clusters of Galaxies
Hector Aceves, Jaime Perea
The projected (PME) and virial mass estimator (VME) are revisited and tested using an N-body equilibrium system. It is found that the PME can overestimate the mass by approx 40% if…