Browsing by Author "Lazaro, C"

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CCD Photometry of the globular cluster M2. RR Lyrae physical parameters and new variables

Lazaro, C; Arellano Ferro, A; Arevalo, M. J; Bramich, D. M; Giridhar, S; Poretti, E (Wiley-Blackwell, 2006-10)

We report the results of CCD V and R photometry of the RR Lyrae stars in M2. The periodicities of most variables are revised and new ephemerides are calculated. Light curve decomposition of the RR Lyrae stars was carried ...
A new study of the variable star population in the Hercules globular cluster (M13; NGC 6205)

Deras, D; Arellano Ferro, A; Lazaro, C; Bustos Fierro, I. H; Calderon, J. H; Muneer, S; Giridhar, S (Oxford University Press on behalf of the Royal Astronomical Society, 2019-06)

We present the results from VI CCD time-series photometry of the globular cluster M13 (NGC 6205). From the Fourier decomposition of the light curves of RRab and RRc stars we found an average metallicity of [Fe/H]zw = −1.58 ...
NGC 6712: the variable star population of a tidally disrupted globular cluster

Deras, D; Arellano Ferro, A; Lazaro, C; Bustos Fierro, I. H; Calderon, J. H; Muneer, S; Giridhar, S (Oxford University Press on behalf of the Royal Astronomical Society, 2020-04)

We present an analysis of VI CCD time-series photometry of globular cluster NGC 6712. Our main goal is to study the variable star population as indicators of the cluster mean physical parameters. We employed the Fourier ...

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