arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.10133astro-ph.GA
收藏

Milky Way内部重元素演化

Heavy element evolution in the inner regions of the Milky Way

F. Matteucci, A. Vasini, V. Grisoni, M. Schultheis

摘要:

我们提出的结果的丰度的演变的重元素(O,Mg,Al,Si,K,Ca,Cr,Mn,Ni和Fe)在银河系内的区域($R_{GC} < 4$ kpc)。我们采用了一个详细的化学演化模型已经测试的银河系核球和比较的结果与APOGEE数据。我们从文献中的一组产量开始,这些产量被认为是最好的,可以重现太阳附近的丰度模式。我们发现,在一般情况下,预测的趋势很好地再现数据,但在某些情况下,无论是趋势或预测丰度的绝对值需要校正,即使是大的因素,以达到最佳的协议。我们建议如何修改目前的恒星产量应重现的数据,我们讨论了这种修正是否是合理的,根据目前的知识恒星核合成。然而,我们也批判性地讨论了观察结果。我们的研究结果表明,硅,钙,铬和镍是所需的修正是最小的元素,而镁和铝适度的修改是必要的。另一方面,O和K需要最大的修正才能重现观测到的模式,这是太阳附近丰度模式已经得出的结论,但氧除外。对于Mn,我们应用在以前的作品中已经建议的校正。\end{abstract}

英文摘要:

We present results for the evolution of the abundances of heavy elements (O, Mg, Al, Si, K, Ca, Cr, Mn, Ni and Fe) in the inner Galactic regions ($R_{GC} < 4$kpc). We adopt a detailed chemical evolution model already tested for the Galactic bulge and compare the results with APOGEE data. We start with a set of yields from the literature which are considered the best to reproduce the abundance patterns in the solar vicinity. We find that in general the predicted trends nicely reproduce the data but in some cases either the trend or the absolute values of the predicted abundances need to be corrected, even by large factors, in order to reach the best agreement. We suggest how the current stellar yields should be modified to reproduce the data and we discuss whether such corrections are reasonable in the light of the current knowledge of stellar nucleosynthesis. However, we also critically discuss the observations. Our results suggest that Si, Ca, Cr and Ni are the elements for which the required corrections are the smallest, while for Mg and Al moderate modifications are necessary. On the other hand, O and K need the largest corrections to reproduce the observed patterns, a conclusion already reached for solar vicinity abundance patterns, with the exception of oxygen. For Mn we apply corrections already suggested in previous works. \end{abstract}

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。

↑