利用[Mg/Mn]与[Al/Fe]丰度比开展星系考古学研究——不确定性与注意事项
Galactic Archaeology with [Mg/Mn] versus [Al/Fe] abundance ratios -- Uncertainties and caveats
AI总结：
本研究通过化学演化模型分析核合成产额不确定性对[Mg/Mn]-[Al/Fe]丰度比图的影响，发现产额误差会导致该图的恒星形成历史诊断结果不可靠，需未来恒星计算降低元素核合成不确定性以提升其应用价值。
摘要：
描绘[Mg/Mn]与[Al/Fe]丰度比关系的图作为探索银河系及本星系群演化核心问题的有力工具，在近年文献中受到关注。具体而言，这种元素组合被认为对恒星形成历史（SFH）高度敏感，其丰度上留下的印记可揭示该历史。遗憾的是，目前仍缺乏对相关不确定性的全面讨论，导致难以判断相关结果的可靠程度。\n本文通过精细的化学演化模型，分析了镁（Mg）、铝（Al）、锰（Mn）、铁（Fe）的核合成不确定性，以展示不同产额会如何影响[Mg/Mn]-[Al/Fe]平面上的趋势。实际上，若不同的产额假设会产生相互矛盾的结果，那么[Mg/Mn]与[Al/Fe]关系图就不能作为星系恒星形成历史的可靠诊断工具。\n我们讨论了多个采用不同核合成方案的银河系（MW）和大麦哲伦云（LMC）化学演化模型所预测的[Mg/Mn]-[Al/Fe]图结果。结果显示，现有文献中的产额需要引入一些修正因子，才能重现APOGEE DR17中银河系内Mg、Al、Mn的丰度，且这些修正因子同样能改善大麦哲伦云的模拟结果。特别地，我们发现修改大质量恒星的Mg和Al产额后，[Mg/Mn]-[Al/Fe]图的变化趋势会发生显著改变。\n结论表明，在产额的误差范围内调整产额取值，得到的趋势会存在极大差异，导致难以得出关于星系恒星形成历史的可靠结论。因此，从理论角度看，该 proposed 图存在不确定性；若未来恒星计算能降低这些元素（Mg、Mn、Al、Fe）的核合成不确定性，它有望成为恒星形成历史的良好诊断工具。
英文摘要：
The diagram depicting the abundance ratios [Mg/Mn] vs. [Al/Fe] has gained attention in recent literature as a valuable tool for exploring fundamental aspects of the evolution of the Milky Way and the Local Group. In particular, this combination of elements is supposed to be highly sensitive to the star formation history (SFH), unveiled by the imprints left on those abundances. Unfortunately, a complete discussion on the uncertainties associated is still missing, making it difficult to know how reliable the associated results are. In this paper we analyze, by means of detailed chemical evolution models, the nuclear uncertainties of Mg, Al, Mn and Fe to show how different yields can affect the trends in the [Mg/Mn] vs. [Al/Fe] plane. In fact, if different yield assumptions produce conflicting results, then the [Mg/Mn] vs. [Al/Fe] diagram does not represent a strong diagnostic for the SFH of a galaxy. We discuss the results on the [Mg/Mn] vs. [Al/Fe] diagram, as predicted by several Milky Way (MW) and Large Magellanic Cloud (LMC) chemical evolution models adopting different nucleosynthesis prescriptions. The results show that the literature yields require some corrective factors to reproduce the APOGEE DR17 abundances of Mg, Al and Mn in the MW and that the same factors can also improve the results for the LMC. In particular, we show that by modifying the massive stars yields of Mg and Al the behaviour of the [Mg/Mn] vs. [Al/Fe] plot changes substantially. In conclusion, by changing the yields within their error bars, one obtains trends which differ strongly, making it difficult to draw any reliable conclusion on the SFH of galaxies. The proposed diagram is therefore uncertain from a theoretical point of view and it could represent a good diagnostic for SFH if the uncertainties on the nucleosynthesis of these elements (Mg, Mn, Al and Fe) could be reduced by future stellar calculations.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
