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Schiappacasse-Ulloa, J.Tang, B.Fernández-Trincado, J.G.Zamora, O.Geisler, D.Frinchaboy, P.Schultheis, M.Dell'Agli, F.Villanova, S.Masseron, T.Mészáros, S.Souto, D.Hasselquist, S.Cunha, K.Smith, V.V.García-Hernández, D.A.Vieira, K.Robin, A.C.Minniti, D.Zasowski, G.Moreno, E.Pérez-Villegas, A.Lane, R.R.Ivans, I.I.Pan, K.Nitschelm, C.Santana, F.A.Carrera, R.Roman-Lopes, A.[A Chemical and Kinematical Analysis of the Intermediate-age Open Cluster IC 166 from APOGEE and Gaia DR2]A Chemical and Kinematical Analysis of the Intermediate-age Open Cluster IC 166 from APOGEE and Gaia DR2

In this work, we make use of DR14 APOGEE spectroscopic data to study a sample of 92 known OB stars. We developed a near-infrared semi-empirical spectral classification method that was successfully used in case of four new exemplars, previously classified as later B-type stars. Our results agree w...


Roman-Lopes, A.Román-Zúñiga, C.Tapia, M.Chojnowski, D.Gómez Maqueo Chew, Y.García-Hernández, D.A.Borissova, J.Minniti, D.Covey, K.R.Longa-Peña, P.Fernandez-Trincado, J.G.Zamora, O.Nitschelm, C.[Massive stars in the SDSS-IV/APOGEE SURVEY. I. OB stars]Massive stars in the SDSS-IV/APOGEE SURVEY. I. OB stars

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

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