The impact of stellar abundance variations on stellar habitable zone evolution

Patrick Young, Kelley Liebst, Michael Pagano

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

The high-quality spectra required for radial velocity planet searches are well suited to providing abundances for a wide array of elements in large samples of stars. Abundance ratios of the most common elements relative to Fe are observed to vary by more than a factor of two in planet host candidates. This level of variation has a substantial impact on the evolution of the host star and the extent of its habitable zone. We present stellar models of 1M stars with custom compositions representing the full range of these non-solar abundance ratios. We find that the effects derived from variation over the observed range of [O/Fe] has a particularly dramatic effect. Habitability lifetimes for some classes of orbits can vary by gigayears for the observed range in [O/Fe].

Original languageEnglish (US)
Article numberL31
JournalAstrophysical Journal Letters
Volume755
Issue number2
DOIs
StatePublished - Aug 20 2012

Keywords

  • stars: abundances
  • stars: evolution

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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