标题： 恒星 yields 与化学演化 - 太阳邻域作为校准器 显示英文标题

标题： Stellar yields and chemical evolution - The solar neighborhood as a calibrator

摘要： 讨论了恒星核合成中的不确定性及其对化学演化模型的影响。比较Woosley & Weaver（1995）和Thielemann, Nomoto, & Hashimoto（1996）提出的II型超新星核合成方案，结果表明后者预测的Mg/Fe比值更高，更有利于再现银河系观测到的丰度特征。如果化学演化模型以太阳邻域为校准基准，它们可以成为限制结构形成的强大工具。特别是那些导致恒星形成历史显著长于1 Gyr的星系形成模型无法重现椭圆星系中观测到的超太阳Mg/Fe比值。 显示英文摘要

摘要： Uncertainties in stellar nucleosynthesis and their impact on models of chemical evolution are discussed. Comparing the Type II supernova nucleosynthesis prescriptions from Woosley & Weaver (1995) and Thielemann, Nomoto, & Hashimoto (1996), it turns out that the latter predict higher Mg/Fe ratios that are more favorable in reproducing the observed abundance features of the Milky Way. Provided that chemical evolution models are calibrated on the solar neighborhood, they offer a powerful tool to constrain structure formation. In particular, galaxy formation models that yield star formation histories significantly longer than 1 Gyr fail to reproduce the super-solar Mg/Fe ratios observed in elliptical galaxies.