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Context. The globular cluster HP 1 is projected at only 3.̊33 from the Galactic center. Together with its distance, this makes it one of the most central globular clusters in the Milky Way. It has a blue horizontal branch (BHB) and a metallicity of [Fe/H] ≈ −1.0. This means that it probably is on...


Barbuy, B.Cantelli, E.Vemado, A.Ernandes, H.Ortolani, S.Saviane, I.Bica, E.Minniti, D.Dias, B.Momany, Y.Hill, V.Zoccali, M.Siqueira-Mello, C.[High-resolution abundance analysis of red giants in the metal-poor bulge globular cluster HP 1]High-resolution abundance analysis of red giants in the metal-poor bulge globular cluster HP 1

D'Orazi, V.Magurno, D.Bono, G.Matsunaga, N.Braga, V.F.Elgueta, S.S.Fukue, K.Hamano, S.Inno, L.Kobayashi, N.Kondo, S.Monelli, M.Nonino, M.Przybilla, N.Sameshima, H.Saviane, I.Taniguchi, D.Thevenin, F.Urbaneja-Perez, M.Watase, A.Arai, A.Bergemann, M.Buonanno, R.Dall'Ora, M.Da Silva, R.Fabrizio, M.Ferraro, I.Fiorentino, G.Francois, P.Gilmozzi, R.Iannicola, G.Ikeda, Y.Jian, M.Kawakita, H.Kudritzki, R.P.Lemasle, B.Marengo, M.Marinoni, S.Martínez-Vázquez, C.E.Minniti, D.Neeley, J.Otsubo, S.Prieto, J.L.Proxauf, B.Romaniello, M.Sanna, N.Sneden, C.Takenaka, K.Tsujimoto, T.Valenti, E.Yasui, C.Yoshikawa, T.Zoccali, M.[On the Chemical Abundances of Miras in Clusters: V1 in the Metal-rich Globular NGC 5927]On the Chemical Abundances of Miras in Clusters: V1 in the Metal-rich Globular NGC 5927

Context. Oxygen and zinc in the Galactic bulge are key elements for the understanding of the bulge chemical evolution. Oxygen-to-iron abundance ratios provide a most robust indicator of the star formation rate and chemical evolution of the bulge. Zinc is enhanced in metal-poor stars, behaving as ...


Da Silveira, C.R.Barbuy, B.Friaça, A.C.S.Hill, V.Zoccali, M.Rafelski, M.Gonzalez, O.A.Minniti, D.Renzini, A.Ortolani, S.[Oxygen and zinc abundances in 417 Galactic bulge red giants]Oxygen and zinc abundances in 417 Galactic bulge red giants

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...


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

We report the first estimate of the He abundance of the population of RR Lyrae stars in the Galactic bulge. This is done by comparing the recent observational data with the latest models. We use the large samples of ab-type RR Lyrae stars found by OGLE IV in the inner bulge and by the VVV survey ...


Marconi, M.Minniti, D.[Gauging the Helium Abundance of the Galactic Bulge RR Lyrae Stars]Gauging the Helium Abundance of the Galactic Bulge RR Lyrae Stars

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