Atomic diffusion and mixing in old stars

2008/09/01 by K. Lind, A. J. Korn, P. S. Barklem +1 · 2 citations
Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Astrophysics and Star Formation Studies #Atomic diffusion #Cluster (spacecraft) #Context (archaeology) #Diffusion #Geology #Globular cluster #Mixing (physics) #Physics #Stars #Stellar, planetary, and galactic studies #Thermodynamics #astro-ph

paper · pdf · doi:10.1051/0004-6361:200810051

11 pages + appendix 6 pages, 9 figures. Accepted for publication in A&A

arxiv created 2008/09/01 · openalex publication_date 2008/09/11 · arxiv updated 2009/12/01 · openalex created_date 2022/10/02 · openalex updated_date 2026/07/31

Abstract

Context. Evolutionary trends in the surface abundances of heavier elements have recently been identified in the globular cluster NGC 6397 ([Fe/H] = -2), indicating the operation of atomic diffusion in these stars. Such trends constitute important constraints for the extent to which diffusion modifies the internal structure and surface abundances of solar-type, metal-poor stars.

Citations

• VLT observations of turnoff stars in the globular cluster NGC 6397
• A non-LTE study of neutral and singly-ionized calcium in late-type stars
• Non-LTE line formation for heavy elements in four very metal-poor stars
• Atomic Diffusion and Mixing in Old Stars. I. Very Large Telescope FLAMES‐UVES Observations of Stars in NGC 6397
• Abundance Variations within Globular Clusters

Cited by

• NGC 6397: The metallicity trend along the isochrone revisited
• Signatures of intrinsic Li depletion and Li-Na anti-correlation in the metal-poor globular cluster NGC 6397