Líneas de investigación: La Vía Láctea y el Grupo Local (MWLG)

La Vía Láctea y el Grupo Local (MWLG)
  • Publicación
    Chemical Abundances of Main-sequence, Turnoff, Subgiant, and Red Giant Stars from APOGEE Spectra. II. Atomic Diffusion in M67 Stars
    Chemical abundances for 15 elements (C, N, O, Na, Mg, Al, Si, K, Ca, Ti, V, Cr, Mn, Fe, and Ni) are presented for 83 stellar members of the 4 Gyr old solar...
  • Publicación
    Chemical Abundances of Planetary Nebulae in the Substructures of M31. II. The Extended Sample and a Comparison Study with the Outer-disk Group
    We report deep spectroscopy of 10 planetary nebulae (PNe) in the Andromeda Galaxy (M31) using the 10.4 m Gran Telescopio Canarias (GTC). Our targets reside in...
  • Publicación
    Chemical analysis of CH stars - III. Atmospheric parameters and elemental abundances
    Elemental abundances of CH stars can provide observational constraints for theoretical studies on the nucleosynthesis and evolution of low- and intermediate...
  • Publicación
    Chemical and Kinematic Analysis of CN-strong Metal-poor Field Stars in LAMOST DR3
    The large amount of chemical and kinematic information available in large spectroscopic surveys has inspired the search for chemically peculiar stars in the...
  • Publicación
    Chemical Cartography with APOGEE: Mapping Disk Populations with a 2-process Model and Residual Abundances
    We apply a novel statistical analysis to measurements of 16 elemental abundances in 34,410 Milky Way disk stars from the final data release (DR17) of APOGEE-2...
  • Publicación
    Chemical Cartography with APOGEE: Metallicity Distribution Functions and the Chemical Structure of the Milky Way Disk
    Using a sample of 69,919 red giants from the SDSS-III/APOGEE Data Release 12, we measure the distribution of stars in the [α/Fe] versus [Fe/H] plane and the...
  • Publicación
    Chemical Cartography with APOGEE: Multi-element Abundance Ratios
    We map the trends of elemental abundance ratios across the Galactic disk, spanning R=3{--}15 {kpc} and midplane distance | Z| =0{--}2 {kpc}, for 15 elements in...
  • Publicación
    Chemical Composition of Two Bright, Extremely Metal-poor Stars from the SDSS MARVELS Pre-survey
    SDSS J082625.70+612515.10 (V = 11.4 [Fe/H] = ‑3.1) and SDSS J134144.60+474128.90 (V = 12.4 [Fe/H] = ‑3.2) were observed with the SDSS 2.5m telescope as part of...
  • Publicación
    Chemical Compositions of Field and Globular Cluster RR Lyrae Stars. I. NGC 3201
    We present a detailed spectroscopic analysis of horizontal branch stars in the globular cluster NGC 3201. We collected optical (4580–5330 Å), high-resolution (...