2006/08/19 by J. M. Benkő, J. M. Benko, G. Á. Bakos +2 · 1 citation
Physics and Astronomy · #Absolute magnitude #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Brightness #Cepheid variable #Distance modulus #Galaxy #Globular cluster #History and Developments in Astronomy #Horizontal branch #Instability strip #Light curve #Luminosity #Photometry (optics) #Physics #RR Lyrae variable #Stars #Stellar, planetary, and galactic studies #Variable star #astro-ph
paper · pdf · doi:10.1111/j.1365-2966.2006.10953.x
published as Mon.Not.Roy.Astron.Soc.372:1657-1674,2006 · 24 pages, 15 figures, 8 tables. Accepted by MNRAS on 18. August 2006
arxiv created 2006/08/19 · openalex publication_date 2006/10/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract We present time-series data on the variable stars of the galactic globular cluster Messier 3 (M3). We give BVIC light curves for 226 RR Lyrae, 2 SX Phe and 1 W Vir type variables, along with estimated fundamental photometric parameters such as intensity and magnitude-averaged brightness and pulsation periods. In some cases, the periods we have found significantly differ from the previously published ones. This is the first published light curve and period determination for variable V266. The I-band light curve has not been observed previously for numerous (76) variables. Three new RR Lyrae variables have been discovered. Groups of RR Lyrae variables that belong to different evolutionary stages and have been separated previously on the basis of V data were found here for all colours and colour indices by cluster analysis. The I-band period–luminosity relation is also discussed. From the 66 modulated (Blazhko type) RR Lyrae stars we investigated, six are newly identified and two of them are first overtone pulsators. In the case of 13 RR Lyrae, the period of Blazhko cycle has been estimated for the first time. V252 is identified as a new RRd variable. Amplitude ratios of RRd stars have been investigated to search possible mode content changes. In contrast to previous publications no changes have been found. Problems with the sampling of the time-series of typical cluster variability surveys are demonstrated.