Astrophysical: Stellar abundances

  • Publication
    Cu and Zn abundances in metal-poor stars
    We present Cu and Zn abundances for a sample of 30 stars spanning a metallicity range between solar and [Fe/H]=-3. LTE abundances were obtained using Kurucz...
  • Publication
    Detailed Chemical Abundances for a Benchmark Sample of M Dwarfs from the APOGEE Survey
    Individual chemical abundances for 14 elements (C, O, Na, Mg, Al, Si, K, Ca, Ti, V, Cr, Mn, Fe, and Ni) are derived for a sample of M dwarfs using high...
  • Publication
    Discovery of an Extremely r-process-enhanced Thin-disk Star with [Eu/H] = +0.78
    Highly r-process-enhanced (RPE) stars are rare and usually metal poor ([Fe/H] < ‑1.0), and they mainly populate the Milky Way halo and dwarf galaxies. This...
  • Publication
    Evidence for Evolved Stellar Binary Mergers in Observed B-type Blue Supergiants
    Blue supergiants are the brightest stars in their host galaxies, and yet their evolutionary status has been a long-standing problem in stellar astrophysics. In...
  • Publication
    Heavy-element Abundances in P-rich Stars: A New Site for the s-process?
    The recently discovered phosphorus-rich stars pose a challenge to stellar evolution and nucleosynthesis theory, as none of the existing models can explain their...
  • Publication
    Investigating Phosphorus Abundances in a Sample of APOGEE-2 Bulge Globular Clusters
    Phosphorus-enhanced (P-rich; [P/Fe] ≳ +0.8) giants have been found among mildly metal-poor field stars, but in only one star in a globular cluster (GC), M4 (NGC...
  • Publication
    Mapping the Milky Way with Gaia BP/RP Spectra. III. The First Medium-resolution Follow-up Spectroscopy of Metal-poor Stars<SUP></SUP>
    The Gaia BP/RP spectra provide an excellent opportunity to search for extremely metal-poor (EMP; [M/H] ≤ –3.0) stars. In this study, we assess the potential of...
  • Publication
    Multiple Populations in Low-mass Globular Clusters: Palomar 13
    Since the discovery of chemically peculiar stars in globular clusters in the last century, the study of multiple populations has become increasingly important...
  • Publication
    On the Pair-instability Supernova Origin of J1010+2358
    The first (Population III) stars formed only out of H and He and were likely more massive than present-day stars. Massive Population III stars in the range 140...