2003/03/07 by Nikos Prantzos, N. Prantzos · 1 citation
Engineering · Physics and Astronomy · #Abundance (ecology) #Astronomy and Astrophysical Research #Galactic corona #Galactic halo #Halo #Metallicity #Milky Way #Outflow #Space Technology and Applications #Stars #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1051/0004-6361:20030445
published as Astron.Astrophys. 404 (2003) 211-216 · Astronomy and Astrophysics, accepted for publication (5 pages, 1 fig.)
arxiv created 2003/03/07 · openalex publication_date 2003/05/26 · openalex created_date 2016/06/24 · arxiv updated 2016/08/30 · openalex updated_date 2026/08/05
It is shown that the low-metallicity tail of the stellar metallicity distribution predicted by simple Outflow models for the Milky Way halo depends sensitively on whether instantaneous recycling is adopted or relaxed. In both cases, current – and still preliminary – data suggest a “G-dwarf problem” for the halo (reminiscent of the local disk). We suggest that the problem can be solved by introducing a (physically motivated) early infall phase. We point out several important implications of such a modification, concerning: the putative Pop. III (super)massive stars, the number of stars expected at very low metallicities, the questions of primary nitrogen and of the dispersion in abundance ratios of halo stars.