论文标题
祖先质量依赖性产生在矮元素元素丰度比中放大固有散射
Progenitor-mass-dependent yields amplify intrinsic scatter in dwarf-galaxy elemental abundance ratios
论文作者
论文摘要
在流体动力模拟中，流行的亚网格化学进化模型通常使用单一的“ IMF平衡”超新星产率，忽略了高等和下层质量超新星祖细胞中的元素丰度比（尤其是[$α$/fe]）的变化。为了了解这种简化的影响并了解更明确的模型的影响，我们使用核合理数据库的NugRID数据库中依赖于Stellar oferar ofernther的nugrid数据库进行了矮人星系$（m_ \ star（$ z = 0 $）\ sim 10^6 m_ \ odot）$ $。虽然Nugrid的总$α$元素的产量低于默认发生的产量，但我们发现其明显的质量依赖性显着扩大了模拟的[Fe/H] - [$α$/Fe]中的固有散射 - 在最近观察到Dwarf Galaxies的最新观察结果中，这是一种可能可见的现象。
In hydrodynamic simulations, prevailing subgrid chemical-evolution models often use a single, "IMF-averaged" supernova yield, ignoring variations in elemental abundance ratios (particularly [$α$/Fe]) in the ejecta of higher- and lower-mass supernova progenitors within a stellar population. To understand the impact of this simplification and understand the impact of more explicit models, we run FIRE simulations of a dwarf galaxy $(M_\star($z = 0$) \sim 10^6 M_\odot)$ using nucleosynthetic yields from the NuGrid database that depend on the stellar progenitor mass and metallicity. While NuGrid exhibits lower aggregate $α$-element production than default-FIRE yields, we find that its explicit mass dependence substantially widens the intrinsic scatter in the simulated [Fe/H]-[$α$/Fe] -- a phenomenon potentially visible in recent observations of dwarf galaxies.
