A Search for Evidence of an Abundance Gradient in the Galactic Halo Based on Stars from SDSS-I DR-5
One of the classical tests of the early dynamical evolution of the Milky Way is the prediction of the monolithic collapse model (e.g., Eggen, Lynden-Bell, & Sandage 1962) of a decline in the mean stellar abundance of the halo population as one proceeds to stars at greater distances, or equivalently, with higher local space velocities in the solar
Carollo, Daniela et al.
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2006