Astrophysical: Chemically peculiar stars

  • 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...