Zobrazeno 1 - 10
of 326
pro vyhledávání: '"Fierro, I."'
Autor:
Ferro, A. Arellano, Parra, C. E. Pérez, Yepez, M. A., Fierro, I. H. Bustos, Prudil, Z., Guillen, L. J. Zerpa
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 Catalogue of Variable stars in Globular Clusters (CVSGC; Clement et al. 2
Externí odkaz:
http://arxiv.org/abs/2408.11141
Autor:
Ferro, A. Arellano, Guillen, L. J. Zerpa, Yepez, M. A., Fierro, I. H. Bustos, Prudil, Z., Parra, C. E. Pérez
We made a survey of the variable stars in a $13.2 \times 13.2$ arcmin$^2$ centered on the field of the Galactic bulge cluster NGC 6558. A total of 78 variables was found in the field of the cluster. Many of these variables are included in the Catalog
Externí odkaz:
http://arxiv.org/abs/2407.00523
Autor:
Ferro, A. Arellano, Muneer, S., Giridhar, Sunetra, Fierro, I. Bustos, Yepez, M. A., Pérez, G. A. García, Segura, G. Rios
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 for about 3100 stars in the cluster field with proper motions from $Ga
Externí odkaz:
http://arxiv.org/abs/2404.19151
We present a comprehensive analysis of the variable stars projected on the field of the Galactic bulge globular cluster NGC 6522, offering valuable insights into their characteristics. Using proper motions from Gaia DR3, we aim to distinguish between
Externí odkaz:
http://arxiv.org/abs/2310.16257
We present a CCD $VI$ time-series analysis of the globular cluster NGC 6139 and its variable star population. Using the astrometric data available in $Gaia$-DR3 we performed a membership analysis that enabled the construction of a clean Colour-Magnit
Externí odkaz:
http://arxiv.org/abs/2306.08710
Autor:
Ferro, A. Arellano, Galindo, F. C. Rojas, Fierro, I. H. Bustos, Muneer, S., Yepez, M. A., Giridhar, Sunetra
A five year CCD photometric \emph{VI} time-series of NGC 7006 is employed to perform a detailed analysis of the known population of variable stars. In the process we have corrected inconsistent classifications, sky coordinates and found ten new clust
Externí odkaz:
http://arxiv.org/abs/2212.05021
A CCD VI imaging time-series over 11-year is employed to explore the light curves of stars in the field of Palomar 2. We discovered 20 RRab and 1 RRc variables. A revision of Gaia-DR3 data enabled us to identify 10 more variables and confirm the RRab
Externí odkaz:
http://arxiv.org/abs/2208.07849
We present a $VI$ CCD photometric study and a membership analysis of the globular cluster M56 (NGC 6779). This produced a decontaminated CMD from field stars, which enabled a better confrontation with theoretical isochrones; Zero-Age Horizontal Branc
Externí odkaz:
http://arxiv.org/abs/2202.09395
We present a CCD $VI$ photometric study of the globular cluster M14. Particular attention is given to the variable stars. This allowed new classifications and cluster membership considerations. New variables are reported; 3 RRc, 18 SR and 1 SX Phe. T
Externí odkaz:
http://arxiv.org/abs/2201.02160
Autor:
Ahumada, J. A., Ferro, A. Arellano, Fierro, I. Bustos, Lázaro, C., Yepez, M. A., Schroeder, K. P., Calderón, J.
We present a new time-series VI CCD photometry of the globular cluster NGC 6397, from which we obtained and analysed the light curves of 35 variables carefully identified in the cluster field. We assessed the membership of the variables with an astro
Externí odkaz:
http://arxiv.org/abs/2104.05830