Astrophysical: Chemically peculiar stars

  • 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
    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
    The Carbon Star DY Persei May Be a Cool R Coronae Borealis Variable
    Optical and near-IR photometry suggests that the carbon star DY Persei exhibits fadings similar to those of R Coronae Borealis (RCB) variables. Photometric...
  • Publication
    Zero-metallicity Hypernova Uncovered by an Ultra-metal-poor Star in the Sculptor Dwarf Spheroidal Galaxy
    Although true metal-free "Population III" stars have so far escaped discovery, their nature, and that of their supernovae, is revealed in the chemical products...