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Bertelli Motta, C.Pasquali, A.Richer, J.Michaud, G.Salaris, M.Bragaglia, A.Magrini, L.Randich, S.Grebel, E.K.Adibekyan, V.Blanco-Cuaresma, S.Drazdauskas, A.Fu, X.Martell, S.Tautvaišiene, G.Gilmore, G.Alfaro, E.J.Bensby, T.Flaccomio, E.Koposov, S.E.Korn, A.J.Lanzafame, A.C.Smiljanic, R.Bayo, A.Carraro, G.Casey, A.R.Costado, M.T.Damiani, F.Franciosini, E.Heiter, U.Hourihane, A.Jofré, P.Lardo, C.Lewis, J.Monaco, L.Morbidelli, L.Sacco, G.G.Sousa, S.G.Worley, C.C.Zaggia, S.[The Gaia-ESO Survey: Evidence of atomic diffusion in M67?]The Gaia-ESO Survey: Evidence of atomic diffusion in M67?

We present a detailed spectroscopic analysis of horizontal branch stars in the globular cluster NGC 3201. We collected optical (4580-5330), high-resolution (∼34,000), high signal-to-noise ratio (∼200) spectra for 11 RR Lyrae stars and one red horizontal branch star with the multifiber spectrograp...


Magurno, D.Sneden, C.Braga, V.F.Bono, G.Mateo, M.Persson, S.E.Dall'Ora, M.Marengo, M.Monelli, M.Neeley, J.R.[Chemical Compositions of Field and Globular Cluster RR Lyrae Stars. I. NGC 3201]Chemical Compositions of Field and Globular Cluster RR Lyrae Stars. I. NGC 3201

Smiljanic, R.Franciosini, E.Bragaglia, A.Tautvaišiene, G.Fu, X.Pancino, E.Adibekyan, V.Sousa, S.G.Randich, S.Montalbán, J.Pasquini, L.Magrini, L.Drazdauskas, A.García, R.A.Mathur, S.Mosser, B.Régulo, C.De Assis Peralta, R.Hekker, S.Feuillet, D.Valentini, M.Morel, T.Martell, S.Gilmore, G.Feltzing, S.Vallenari, A.Bensby, T.Korn, A.J.Lanzafame, A.C.Recio-Blanco, A.Bayo, A.Carraro, G.Costado, M.T.Frasca, A.Jofré, P.Lardo, C.De Laverny, P.Lind, K.Masseron, T.Monaco, L.Morbidelli, L.Prisinzano, L.Sbordone, L.Zaggia, S.[The Gaia -ESO Survey: Properties of newly discovered Li-rich giants]The Gaia -ESO Survey: Properties of newly discovered Li-rich giants

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...


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

NGC 6791 is a unique stellar cluster, key to our understanding of both the multiple stellar population phenomenon and the evolution and assembly of the Galaxy. However, despite many investigations, its nature is still very controversial. Geisler et al. found evidence suggesting that it was the fi...


Villanova, S.Carraro, G.Geisler, D.Monaco, L.Assmann, P.[NGC 6791: A Probable Bulge Cluster without Multiple Populations]NGC 6791: A Probable Bulge Cluster without Multiple Populations

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...


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

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...


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?

The Hubble Space Telescope/WFC3 multiband photometry spanning from the UV to the near-IR of four fields in the Galactic bulge, together with that for six template globular and open clusters, are used to photometrically tag the metallicity [Fe/H] of stars in these fields after proper-motion reject...


Renzini, A.Gennaro, M.Zoccali, M.Brown, T.M.Anderson, J.Minniti, D.Sahu, K.C.Valenti, E.Vandenberg, D.A.[The WFC3 Galactic Bulge Treasury Program: Relative Ages of Bulge Stars of High and Low Metallicity]The WFC3 Galactic Bulge Treasury Program: Relative Ages of Bulge Stars of High and Low Metallicity

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