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RR Lyrae in M15: Fourier Decomposition and Physical Parameters

Published online by Cambridge University Press:  09 August 2007

G. García Lugo ,
A. Arellano Ferro  and
Patricia Rosenzweig
G. García Lugo
Affiliation:
Grupo para la Enseñanza y el Aprendizaje de las Ciencias, Depto. de Pedagogía y Didáctica, Facultad de Humanidades y Educación, Universidad de Los Andes, Mérida, Venezuela
A. Arellano Ferro
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, D.F.
Patricia Rosenzweig
Affiliation:
Grupo de Astrofísica Teórica, Depto. de Física, Facultad de Ciencias, Núcleo La Hechicera, Universidad de Los Andes, Mérida, Venezuela email: gygarcia@ula.ve
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Abstract

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The V and R light curves for 30 RR Lyrae stars in M15 were used to calculate their physical parameters. The Blazhko effect, previously reported in V12, was not detected. The determined values of the iron content and distance of the cluster are: [Fe/H] = −1.98 ± 0.24 and d = 8.67 ± 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.

Keywords

Globular Clusters-M15Variable Stars-RR Lyrae
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S240: Binary Stars as Critical Tools & Tests in Contemporary Astrophysics , August 2006 , pp. 605 - 612
Copyright
Copyright © International Astronomical Union 2007

References

Arellano Ferro, A., Arévalo, M.J., Lázaro, C., Rey, M., Bramich, D.M., & Giridhar, S. 2004, RMxAA, 40, 209 Google Scholar
Arellano Ferro, A., García, Lugo, G. & Rosenzweig, P. 2006, RMxAA, 42, 75 Google Scholar
Brown, A. 1951, ApJ, 113, 344 CrossRefGoogle Scholar
Buonanno, R., Corsi, C.E., & Fusi Pecci, F. 1985, A&A, 145, 97 Google Scholar
Clement, C. 1985, Catalogue of Variable Stars in Globular Clusters; http://www.astro.utoronto.ca/~cclement/read.html Google Scholar
Clement, C. & Shelton, I. 1997, AJ, 113, 1711 CrossRefGoogle Scholar
Cox, A.N, Hudson, S.W. & Clancy, S.P. 1983, ApJ, 266, 94 CrossRefGoogle Scholar
Harris, W.E. 1996, AJ, 112, 1487; (http://www.physics.mcmaster.ca/Globular.html)CrossRefGoogle Scholar
Jurcsik, J. 1998, A&A, 333, 571 Google Scholar
Jurcsik, J. & Kovács, G. 1996, A&A, 312, 111 Google Scholar
Kaluzny, J., Hilditch, R.W., Clement, C., & Ricinski, S.M. 1998, MNRAS, 296, 347 CrossRefGoogle Scholar
Kaluzny, J., Olech, A., Thompson, I., Pych, W., Krzeminski, W., & Schwarzenberg-Czerny, A. 2000, A&AS, 143, 215 Google Scholar
Kovács, G. & Jurcsik, J. 1996, ApJ, 466, L17 CrossRefGoogle Scholar
Kovács, G. & Jurcsik, J. 1997, A&A, 322, 218 Google Scholar
Lázaro, C., Arellano Ferro, A., Arévalo, M.J., Bramich, D. M., Giridhar, S., & Poretti, E. 2005, in preparationGoogle Scholar
Lee, Y-W. & Demarque, P. 1990, ApJS, 73, 709 CrossRefGoogle Scholar
Marín, Z. 2002, M Sc. Thesis, Universidad de Los Andes, Venezuela Google Scholar
McNamara, B.J., Harrison, T.E. & Baumgardt, H. 2004, AJ, 602, 264 CrossRefGoogle Scholar
Morgan, S.M., Wahl, J.N., & Wieckhorst, R.M. 2005, MNRAS, astro-ph/0506348Google Scholar
Notni, P. & Oleak, H. 1958, AN, 284, 49 Google Scholar
Olech, A., Kaluzny, J., Thompson, I.B., Pych, W., Krzeminski, W. & Shwarzenberg-Czerny, A. 1999, AJ, 118, 442 CrossRefGoogle Scholar
Sandage, A. 1970, ApJ, 162, 841 CrossRefGoogle Scholar
Sandage, A., Cacciari, C. 1990, ApJ, 350, 645 CrossRefGoogle Scholar
Sandage, A., Katem, B. & Sandage, M. 1981, ApJS, 46, 41 CrossRefGoogle Scholar
Silbermann, N.A. & Smith, H.A. 1995, AJ, 109, 1119 CrossRefGoogle Scholar
Simon, N. R. & Clement, C. M. 1993, ApJ, 410, 526 CrossRefGoogle Scholar
Walker, A.R. 1999, AJ, 116, 220 CrossRefGoogle Scholar