Physical parameters of RR Lyrae stars in M15

  • G. García Lugo Universidad de Los Andes-Venezuela
  • H. Arellano Ferro Universidad Nacional Autónoma de México
  • Patricia Rosenzweig Universidad de Los Andes-Venezuela
Palabras clave: blazhko effect, globular clusters-M15, variable stars-RR Lyrae

Resumen

The V, R light curves for 33 RR Lyrae stars in M15 were used to calculate their physical parameters. The Blazhko effect, previously reported in V12, was not detected. The values for the iron content and distance of the cluster are: [Fe/H]= -1.98 Ó 0.24 and d = 8.67 Ó 0.41 kpc, respectively. The mean values of the physical parameters, determined for the RR Lyrae, stars place the cluster precisely into the sequences Oosterhoff type ”“ metallicity and metallicity ”“ effective temperature, valid for globular clusters. Evidences of evolution from the ZAHB are found for the RRc but not for the RRab stars.

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Cómo citar
García Lugo, G., Arellano Ferro, H., & Rosenzweig, P. (1). Physical parameters of RR Lyrae stars in M15. Ciencia, 15(3). Recuperado a partir de https://produccioncientificaluz.org/index.php/ciencia/article/view/9740
Número
Vol. 15 Núm. 3
Sección
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