4 papers
The variable stars in the compact halo globular cluster NGC 5634 visited again
A. Arellano Ferro, R. Michel, M. A. Yepez +3
We present new time-series CCD \emph{VR} photometry of the globular cluster NGC 5634. We aim to use the known RR Lyrae stars, members of the cluster, as indicators of mean metallic…
The variable stars population of the extended young globular cluster NGC 1851
A. Arellano Ferro, C. E. Pérez Parra, M. A. Yepez +3
We report VI CCD photometry of the globular cluster cluster NGC 1851. We aim to study the membership of the variable stars detected in the field of the cluster as listed in the Cat…
The variable stars in the field of the bulge cluster NGC 6558
A. Arellano Ferro, L. J. Zerpa Guillen, M. A. Yepez +3
We made a survey of the variable stars in a arcmin centered on the field of the Galactic bulge cluster NGC 6558. A total of 78 variables was found in the fie…
Long term CCD photometry of the distant cluster NGC 2419: the CMD revisited
A. Arellano Ferro, S. Muneer, Sunetra Giridhar +4
Employing \emph{VI} images of NGC 2419 acquired over 17 years, light curves for most of the known variables in the field of the cluster are produced. A cluster membership analysis…