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Article 2018-08

Autor: Monaco, L. Villanova, S. Carraro, G. Mucciarelli, A. Moni Bidin, C.

Context. Globular clusters are known to host multiple stellar populations, which are a signature of their formation process. The globular cluster E3 is one of the few low-mass globulars that is thought not to host multiple populations. Aims. We investigate red giant branch stars in E3 with the ai...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/11264

Repositorio Universidad Andrés Bello
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Monaco, L. ,  Villanova, S. ,  Carraro, G. ,  Mucciarelli, A. ,  Moni Bidin, C. ,  [Chemical abundance analysis of red giant branch stars in the globular cluster E3] ,  Chemical abundance analysis of red giant branch stars in the globular cluster E3
Article 2018-03

Autor: Hansen, C.J. El-Souri, M. Monaco, L. Villanova, S. Bonifacio, P. Caffau, E. Sbordone, L.

Sagittarius (Sgr) is a massive disrupted dwarf spheroidal galaxy in the Milky Way halo that has undergone several stripping events. Previous chemical studies were restricted mainly to a few, metal-rich ([Fe/H] ) stars that suggested a top-light initial mass function (IMF). Here we present the fir...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/7050

Repositorio Universidad Andrés Bello
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Hansen, C.J. ,  El-Souri, M. ,  Monaco, L. ,  Villanova, S. ,  Bonifacio, P. ,  Caffau, E. ,  Sbordone, L. ,  [Ages and Heavy Element Abundances from Very Metal-poor Stars in the Sagittarius Dwarf Galaxy] ,  Ages and Heavy Element Abundances from Very Metal-poor Stars in the Sagittarius Dwarf Galaxy
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 2016-08

Autor: Villanova, S. Monaco, L. Moni Bidin, C. Assmann, P.

We present the abundance analysis for a sample of 18 red giant branch stars in the metal-poor globular cluster NGC 4147 based on medium- and high-resolution spectra. This is the first extensive spectroscopic study of this cluster. We derive abundances of C, N, O, Na, Mg, Al, Si, Ca, Ti, Cr, Fe, N...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/2972

Repositorio Universidad Andrés Bello
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Villanova, S. ,  Monaco, L. ,  Moni Bidin, C. ,  Assmann, P. ,  [A spectroscopic study of the globular Cluster NGC 4147] ,  A spectroscopic study of the globular Cluster NGC 4147
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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