108 citations · 341 across the 25 of their papers we have counts for
25 papers
Study of the open cluster Alessi-Teutsch 9 (ASCC 10) using multiband photometry and Gaia EDR3
Nestor Sanchez, Fatima Lopez-Martinez, Sandra Ocando +1
There is a growing interest in the automated characterization of open clusters using data from the Gaia mission. This work evidences the importance of choosing an appropriate sampl…
The decline of astronomical research in Venezuela
Nestor Sanchez
During the last 15 years the number of astronomy-related papers published by scientists in Venezuela has been continuously decreasing, mainly due to emigration. If rapid corrective…
A catalogue of open cluster radii determined from Gaia proper motions
Nestor Sanchez, Emilio Alfaro, Fatima Lopez-Martinez
In this work we improve a previously published method to calculate in a reliable way the radius of an open cluster. The method is based on the behaviour of stars in the proper moti…
A method for determining the radius of an open cluster from stellar proper motions
Nestor Sanchez, Emilio J. Alfaro, Fatima Lopez-Martinez
We propose a method for calculating the radius of an open cluster in an objective way from an astrometric catalogue containing, at least, positions and proper motions. It uses the…
NGC 2548: clumpy spatial and kinematic structure in an intermediate-age galactic cluster
Belen Vicente, Nestor Sanchez, Emilio J. Alfaro
NGC 2548 is a 400-500 Myr old open cluster with evidence of spatial substructures likely caused by its interaction with the Galactic disk. In this work we use precise astrometric d…
Variation of the ultraviolet extinction law across the Taurus-Auriga star forming complex. A GALEX based study
Ana I. Gomez de Castro, Javier Lopez-Santiago, Fatima Lopez-Martinez +3
The Taurus-Auriga molecular complex (TMC) is the main laboratory for the study of low mass star formation. The density and properties of interstellar dust are expected to vary acro…