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Article 2018-10

Autor: Lemasle, B. Hajdu, G. Kovtyukh, V. Inno, L. Grebel, E.K. Catelan, M. Bono, G. François, P. Kniazev, A. Da Silva, R. Storm, J.

Context. The ratio of the first overtone (1O)/fundamental (F) periods of mixed-mode Cepheids that pulsate simultaneously in these two modes (F/1O) is metallicity-dependent. It can therefore be used to characterize the systems that host such variable stars. Aims. We want to take advantage of the F...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/11499

Repositorio Universidad Andrés Bello
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Lemasle, B. ,  Hajdu, G. ,  Kovtyukh, V. ,  Inno, L. ,  Grebel, E.K. ,  Catelan, M. ,  Bono, G. ,  François, P. ,  Kniazev, A. ,  Da Silva, R. ,  Storm, J. ,  [Milky Way metallicity gradient from Gaia DR2 F/1O double-mode Cepheids] ,  Milky Way metallicity gradient from Gaia DR2 F/1O double-mode Cepheids
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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