The metal content of the bulge globular cluster NGC 6528

M. Zocali, B. Barbuy, V. Hill, S. Ortolani, A. Renzini, E. Bica, Y. Momany, L. Pasquini, D. Minniti, R. M. Rich

Resultado de la investigación: Contribución a una revistaArtículo

26 Citas (Scopus)


High resolution spectra of five stars in the bulge globular cluster NGC 6528 were obtained at the 8m VLT UT2-Kueyen telescope with the UVES spectrograph. Out of the five stars, two of them showed evidence of binarity. The target stars belong to the horizontal and red giant branch stages, at 4000 < feff < 4800 K. Multiband V, I, J, H, Ks photometry was used to derive initial effective temperatures and gravities. The main purpose of this study is the determination of metallicity and elemental ratios for this template bulge cluster, as a basis for the fundamental calibration of metal-rich populations. The present analysis provides a metallicity [Fe/H] = -0.1 ± 0.2 and the α-elements O, Mg and Si, show [α/Fe] =+0.1, whereas Ca and Ti are around the solar value or below, resulting in an overall metallicity Z ≈ Z.

Idioma originalInglés
Páginas (desde-hasta)507-516
Número de páginas10
PublicaciónAstronomy and Astrophysics
EstadoPublicada - 2004

Áreas temáticas de ASJC Scopus

  • Astronomía y astrofísica
  • Ciencias planetarias y espacial

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    Zocali, M., Barbuy, B., Hill, V., Ortolani, S., Renzini, A., Bica, E., Momany, Y., Pasquini, L., Minniti, D., & Rich, R. M. (2004). The metal content of the bulge globular cluster NGC 6528. Astronomy and Astrophysics, 423(2), 507-516.