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Frank Grundahl

High-precision abundances of elements in stars with asteroseismic ages

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High-precision abundances of elements have been derived from HARPS-N spectra of F and G main-sequence stars having ages determined from oscillation frequencies delivered by the Kepler mission. The tight relations between abundance ratios of refractory elements, e.g., [Mg/Fe] and [Y/Mg], and stellar age previously found for solar twin stars are confirmed. These relations provide new information on nucleosynthesis and Galactic evolution. Abundance ratios between volatile and refractory elements, e.g., [C/Fe] and [O/Fe], show on the other hand a significant scatter at a given age, which may be related to planet-star interactions. This is a potential problem for chemical tagging studies.
Original languageEnglish
JournalProceedings of the International Astronomical Union
Pages (from-to)166-169
Publication statusPublished - 2017

    Research areas

  • Stars: abundances, Stars: oscillations, Planet-star interaction, Galaxy: disk, Galaxy: evolution

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ID: 135357983