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arXiv 2202.00463astro-ph.GAastro-ph.SR
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利用疏散星团绘制银河系金属丰度梯度图：现状和未来的挑战

Mapping the Galactic Metallicity Gradient with Open Clusters: The State-of-the-Art and Future Challenges

Lorenzo Spina, Laura Magrini, Katia Cunha

备注：
Published in MDPI Universe as part of the Special Issue on Star Clusters
发表信息：
Universe 2022, 8(2), 87
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摘要：

在本文中，我们利用高分辨率光谱巡天和计划（即，APOGEE、Gaia-ESO、GALAH、OCCASO和SPA）。这些数据已被均匀化，然后作为一个整体进行分析。由此产生的目录包含251个银河系疏散星团的[Fe/H]和轨道参数。通过对175个疏散星团进行高质量的金属丰度测定，得到的径向金属丰度梯度的斜率为$-$ 0.064 $\pm$ 0.007 dex kpc $^{-1}$。由疏散星团追踪的径向金属丰度分布超过R $_{\rm Gal}$ =12.1 $\pm$ 1.1 kpc。疏散星团在[Fe/H]-L $_{\rm z}$图上的斜率为$-$ 0.31 $\pm$ 0.02 10 $^{3}$ dex km $^{-1}$ kpc $^{-1}$ s，但它大于L $_{\rm z}$ =2769 $\pm$ 177 km kpc s $^{-1}$。在本文中，我们还审查了一些高优先级的实际挑战周围的疏散星团的研究，这将显着推动我们的理解超越了国家的最先进的。最后，我们比较的形状的银河系径向金属丰度梯度的其他螺旋星系。

英文摘要：

In this paper, we make use of data collected for open cluster members by high-resolution spectroscopic surveys and programmes (i.e., APOGEE, Gaia-ESO, GALAH, OCCASO, and SPA). These data have been homogenised and then analysed as a whole. The resulting catalogue contains [Fe/H] and orbital parameters for 251 Galactic open clusters. The slope of the radial metallicity gradient obtained through 175 open clusters with high-quality metallicity determinations is $-$0.064 $\pm$ 0.007 dex kpc$^{-1}$. The radial metallicity distribution traced by open clusters flattens beyond R$_{\rm Gal}$=12.1 $\pm$ 1.1 kpc. The slope traced by open clusters in the [Fe/H]-L$_{\rm z}$ diagram is $-$0.31 $\pm$ 0.02 10$^{3}$ dex km$^{-1}$ kpc$^{-1}$ s, but it flattens beyond L$_{\rm z}$=2769 $\pm$ 177 km kpc s$^{-1}$. In this paper, we also review some high-priority practical challenges around the study of open clusters that will significantly push our understanding beyond the state-of-the-art. Finally, we compare the shape of the galactic radial metallicity gradient to those of other spiral galaxies.

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