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Article 2018-04

Autor: Bonifacio, P. Caffau, E. Spite, M. Spite, F. Sbordone, L. Monaco, L. François, P. Plez, B. Molaro, P. Gallagher, A.J. Cayrel, R. Christlieb, N. Klessen, R.S. Koch, A. Ludwig, H.-G. Steffen, M. Zaggia, S. Abate, C.

Context. Extremely metal-poor (EMP) stars provide us with indirect information on the first generations of massive stars. The TOPoS survey has been designed to increase the census of these stars and to provide a chemical inventory that is as detailed as possible. Aims. Seven of the most iron-poor...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/8895

Repositorio Universidad Andrés Bello
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Bonifacio, P. ,  Caffau, E. ,  Spite, M. ,  Spite, F. ,  Sbordone, L. ,  Monaco, L. ,  François, P. ,  Plez, B. ,  Molaro, P. ,  Gallagher, A.J. ,  Cayrel, R. ,  Christlieb, N. ,  Klessen, R.S. ,  Koch, A. ,  Ludwig, H.-G. ,  Steffen, M. ,  Zaggia, S. ,  Abate, C. ,  [TOPoS: IV. Chemical abundances from high-resolution observations of seven extremely metal-poor stars] ,  TOPoS: IV. Chemical abundances from high-resolution observations of seven extremely metal-poor stars
Article 2018-10

Autor: Mucciarelli, A. Salaris, M. Monaco, L. Bonifacio, P. Fu, X. Villanova, S.

We present Li, Na, Al, and Fe abundances of 199 lower red giant branch star members of the stellar system Omega Centauri, using high-resolution spectra acquired with FLAMES at the Very Large Telescope. The A(Li) distribution is peaked at A(Li) ∼ 1 dex with a prominent tail towards lower values. T...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/11491

Repositorio Universidad Andrés Bello
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Mucciarelli, A. ,  Salaris, M. ,  Monaco, L. ,  Bonifacio, P. ,  Fu, X. ,  Villanova, S. ,  [Lithium abundance in lower red giant branch stars of Omega Centauri] ,  Lithium abundance in lower red giant branch stars of Omega Centauri
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 2016-04

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 2018-06

Autor: Caffau, E. Gallagher, A.J. Bonifacio, P. Spite, M. Duffau, S. Spite, F. Monaco, L. Sbordone, L.

Aims. Carbon-enhanced metal-poor (CEMP) stars represent a sizeable fraction of all known metal-poor stars in the Galaxy. Their formation and composition remains a significant topic of investigation within the stellar astrophysics community. Methods. We analysed a sample of low-resolution spectra ...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/9238

Repositorio Universidad Andrés Bello
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Caffau, E. ,  Gallagher, A.J. ,  Bonifacio, P. ,  Spite, M. ,  Duffau, S. ,  Spite, F. ,  Monaco, L. ,  Sbordone, L. ,  [Investigation of a sample of carbon-enhanced metal-poor stars observed with FORS and GMOS] ,  Investigation of a sample of carbon-enhanced metal-poor stars observed with FORS and GMOS
Article 2017-07

Autor: Mucciarelli, A. Monaco, L. Bonifacio, P. Saviane, I.

We observed six He-clump stars of the intermediate-Age stellar cluster Gaia1 with the MIKE/Magellan spectrograph. A possible extra-galactic origin of this cluster, recently discovered thanks to the first data release of the ESA Gaia mission, has been suggested, based on its orbital parameters. Ab...

Enlace original: http://repositorio.unab.cl/xmlui/handle/ria/5034

Repositorio Universidad Andrés Bello
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Mucciarelli, A. ,  Monaco, L. ,  Bonifacio, P. ,  Saviane, I. ,  [Chemical composition of the stellar cluster Gaia1: No surprise behind Sirius] ,  Chemical composition of the stellar cluster Gaia1: No surprise behind Sirius

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