Implications from inhomogeneous chemical evolution: Yields of OZn Original Research Article

Observations of metal-poor stars show intrinsic large dispersions in their chemical abundances. This may indicate that these stars are enriched by only one or a few supernovae, since the inter-stellar gas was not mixed enough at the early epoch. We construct an inhomogeneous chemical evolution model, and compare predicted stellar abundance distributions for OZn with observations. Using statistical method, we show clear differences between two sets of yields; by Nomoto et al. (1997) and by Woosley & Weaver (1995).