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1998AJ....116..748G - Astron. J., 116, 748-753 (1998/August-0)
Element ratios and the formation of the stellar halo.
GILMORE G. and WYSE R.F.G.
Abstract (from CDS):
Furthermore, we point out that the values of the ``Type II plateau'' in the element ratios for disk stars and for halo stars are equal. This implies that the (massive) stars that enriched the early disk and halo had the same initial mass function. However, the bulk of the halo stars with [Fe/H] ∼ -1 dex that have been observed have significantly lower values of [α/Fe] than does a typical disk star of that metallicity. Thus there is a discontinuity in the chemical enrichment history between the halo and disk, as probed by these samples, consistent with previous inferences based on angular momentum considerations.
Abstract Copyright: ∼
Journal keyword(s): Galaxy: Abundances - Galaxy: Formation - Galaxy: Halo
Simbad objects: 1
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