Descripción completa.

Descripción completa.

From uvby photometry of 75 stars in the direction of NGC 7063 we were able to determine membership of some stars and fix the distance (722 ±105 pc), log age (8.146) and reddening (E(b - y) = 0.091 ± 0.039…

Las pruebas empíricas que usan procesos o modelos físicos para probar generadores de numeros pseudoaleatorios, complementan las pruebas de aleatoriedad teóricas y han sido usadas con mucho éxito. En este trabajo se presenta una metodología estadística para evaluar la calidad…

En el presente trabajo se considera el problema de la asociación radiativa de átomos de carbón C con electrones ¯ en el intervalo de temperaturas cinéticas Tc de 100 < Tc < 3000°K. El cálculo de la razón…

Using the fact that the Schrödinger equation for the stationary states of the hydrogen atom is equivalent to an integral equation on the unit sphere in a four-dimensional space, the eigenvalues, the eigenfunctions, and a dynamical symmetry group for this…

A gradient-flow-based approach is proposed in this paper for stabilizing unstable periodic orbits (UPO) embedded in chaotic systems. In order to obtain an on-line stabilizing solution, the stabilization problem is considered to be an optimal control problem, and system state…

A geometric analysis of the screens used for testing convex optical surfaces is presented. Some properties of the transformation between the image plane and the screen plane, such as symmetry and magnification, are presented for the case when the reflecting…

A revised orbit for the visual binary A 2329, calculated taking into account a set of interferometric measures distributed over one orbital revolution, is presented. On the basis of new orbital elements and the Hipparcos parallax, a dynamical mass of…

In this work we model the expected emission from the molecular line C17O(J=32) in protoplanetary disks, modifying different physical parameters to obtain distinctive observational signatures. Our aim is to determine the kind of observations that will allow…