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Article 2016-04

Autor: François, P. Monaco, L. Bonifacio, P. Moni Bidin, C. Geisler, D.

Context. Low-mass dwarf spheroidal galaxies are key objects for our understanding of the chemical evolution of the pristine Universe and the Local Group of galaxies. Abundance ratios in stars of these objects can be used to better understand their star formation and chemical evolution. Aims. We r...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/3983

Repositorio Universidad Andrés Bello
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François, P. ,  Monaco, L. ,  Bonifacio, P. ,  Moni Bidin, C. ,  Geisler, D. ,  [Abundance ratios of red giants in low-mass ultra-faint dwarf spheroidal galaxies] ,  Abundance ratios of red giants in low-mass ultra-faint dwarf spheroidal galaxies
Article 2016-06

Autor: Smiljanic, R. Franciosini, E. Randich, S. Magrini, L. Bragaglia, A. Pasquini, L. Vallenari, A. Tautvaišienė, G. Biazzo, K. Frasca, A. Donati, P. Delgado Mena, E. Casey, A. R. Geisler, D. Villanova, S. Tang, B. Sousa, S. G. Gilmore, G. Bensby, T. François, P. Koposov, S. E. Lanzafame, A. C. Pancino, E. Recio-Blanco, A. Costado, M. T. Hourihane, A. Lardo, C. de Laverny, P. Lewis, J. Monaco, L. Morbidelli, L. Sacco, G. G. Worley, C. C. Zaggia, S. Martell, S.

Aims. We report the discovery of two Li-rich giants, with A(Li) ~ 1.50, in an analysis of a sample of 40 giants of the open cluster Trumpler 20 (with turnoff mass ~1.8 M⊙). The cluster was observed in the context of the Gaia-ESO Survey. Methods. The atmospheric parameters and Li abundances were d...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/2789

Repositorio Universidad Andrés Bello
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Smiljanic, R. ,  Franciosini, E. ,  Randich, S. ,  Magrini, L. ,  Bragaglia, A. ,  Pasquini, L. ,  Vallenari, A. ,  Tautvaišienė, G. ,  Biazzo, K. ,  Frasca, A. ,  Donati, P. ,  Delgado Mena, E. ,  Casey, A. R. ,  Geisler, D. ,  Villanova, S. ,  Tang, B. ,  Sousa, S. G. ,  Gilmore, G. ,  Bensby, T. ,  François, P. ,  Koposov, S. E. ,  Lanzafame, A. C. ,  Pancino, E. ,  Recio-Blanco, A. ,  Costado, M. T. ,  Hourihane, A. ,  Lardo, C. ,  de Laverny, P. ,  Lewis, J. ,  Monaco, L. ,  Morbidelli, L. ,  Sacco, G. G. ,  Worley, C. C. ,  Zaggia, S. ,  Martell, S. ,  [The Gaia-ESO Survey: Inhibited extra mixing in two giants of the open cluster Trumpler 20?] ,  The Gaia-ESO Survey: Inhibited extra mixing in two giants of the open cluster Trumpler 20?
Article 2018

Autor: Hayes, C.R. Majewski, S.R. Shetrone, M. Fernández-Alvar, E. Prieto, C.A. Schuster, W.J. Carigi, L. Cunha, K. Smith, V.V. Sobeck, J. Almeida, A. Beers, T.C. Carrera, R. Fernández-Trincado, J.G. García-Hernández, D.A. Geisler, D. Lane, R.R. Lucatello, S. Matthews, A.M. Minniti, D. Nitschelm, C. Tang, B. Tissera, P.B. Zamora, O.

We find two chemically distinct populations separated relatively cleanly in the [Fe/H]-[Mg/Fe] plane, but also distinguished in other chemical planes, among metal-poor stars (primarily with metallicities [Fe H] < -0.9) observed by the Apache Point Observatory Galactic Evolution Experiment (APOGEE...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/6362

Repositorio Universidad Andrés Bello
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Hayes, C.R. ,  Majewski, S.R. ,  Shetrone, M. ,  Fernández-Alvar, E. ,  Prieto, C.A. ,  Schuster, W.J. ,  Carigi, L. ,  Cunha, K. ,  Smith, V.V. ,  Sobeck, J. ,  Almeida, A. ,  Beers, T.C. ,  Carrera, R. ,  Fernández-Trincado, J.G. ,  García-Hernández, D.A. ,  Geisler, D. ,  Lane, R.R. ,  Lucatello, S. ,  Matthews, A.M. ,  Minniti, D. ,  Nitschelm, C. ,  Tang, B. ,  Tissera, P.B. ,  Zamora, O. ,  [Disentangling the Galactic Halo with APOGEE. I. Chemical and Kinematical Investigation of Distinct Metal-poor Populations] ,  Disentangling the Galactic Halo with APOGEE. I. Chemical and Kinematical Investigation of Distinct Metal-poor Populations
Article 2018

Autor: Fernández-Alvar, E. Carigi, L. Schuster, W.J. Hayes, C.R. Ávila-Vergara, N. Majewski, S.R. Allende Prieto, C. Beers, T.C. Sánchez, S.F. Zamora, O. García-Hernández, D.A. Tang, B. Fernández-Trincado, J.G. Tissera, P. Geisler, D. Villanova, S.

The formation processes that led to the current Galactic stellar halo are still under debate. Previous studies have provided evidence for different stellar populations in terms of elemental abundances and kinematics, pointing to different chemical and star formation histories (SFHs). In the prese...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/6361

Repositorio Universidad Andrés Bello
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Fernández-Alvar, E. ,  Carigi, L. ,  Schuster, W.J. ,  Hayes, C.R. ,  Ávila-Vergara, N. ,  Majewski, S.R. ,  Allende Prieto, C. ,  Beers, T.C. ,  Sánchez, S.F. ,  Zamora, O. ,  García-Hernández, D.A. ,  Tang, B. ,  Fernández-Trincado, J.G. ,  Tissera, P. ,  Geisler, D. ,  Villanova, S. ,  [Disentangling the Galactic Halo with APOGEE. II. Chemical and Star Formation Histories for the Two Distinct Populations] ,  Disentangling the Galactic Halo with APOGEE. II. Chemical and Star Formation Histories for the Two Distinct Populations

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