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Article 2018-11

Autor: Barbuy, B. Muniz, L. Ortolani, S. Ernandes, H. Dias, B. Saviane, I. Kerber, L. Bica, E. Pérez-Villegas, A. Rossi, L. Held, E.V.

Context. NGC 6558 is a bulge globular cluster with a blue horizontal branch (BHB), combined with a metallicity of [Fe/H] â‰-1.0. It is similar to HP 1 and NGC 6522, which could be among the oldest objects in the Galaxy. Element abundances in these clusters could reveal the nature of the first sup...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/11578

Repositorio Universidad Andrés Bello
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Barbuy, B. ,  Muniz, L. ,  Ortolani, S. ,  Ernandes, H. ,  Dias, B. ,  Saviane, I. ,  Kerber, L. ,  Bica, E. ,  Pérez-Villegas, A. ,  Rossi, L. ,  Held, E.V. ,  [High-resolution abundance analysis of four red giants in the globular cluster NGC 6558] ,  High-resolution abundance analysis of four red giants in the globular cluster NGC 6558
Article 2018-06

Autor: Kovtyukh, V. Yegorova, I. Andrievsky, S. Korotin, S. Saviane, I. Lemasle, B. Chekhonadskikh, F. Belik, S.

The chemical composition of 28 Population II Cepheids and one RR Lyrae variable has been studied using high-resolution spectra. The chemical composition of W Vir variable stars (with periods longer than 8 d) is typical for the halo and thick disc stars. However, the chemical composition of BL Her...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/8924

Repositorio Universidad Andrés Bello
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Kovtyukh, V. ,  Yegorova, I. ,  Andrievsky, S. ,  Korotin, S. ,  Saviane, I. ,  Lemasle, B. ,  Chekhonadskikh, F. ,  Belik, S. ,  [Type II Cepheids: Evidence for Na-O anticorrelation for BL Her type stars?] ,  Type II Cepheids: Evidence for Na-O anticorrelation for BL Her type stars?

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