标题： 用疏散星团绘制银河金属丰度梯度：现状与未来挑战 显示英文标题

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

摘要： 在本文中，我们利用高分辨率光谱调查和计划（即APOGEE、Gaia-ESO、GALAH、OCCASO和SPA）收集的开放星团成员数据。这些数据已经过标准化，然后整体进行分析。 resulting catalogue 包含251个银河系开放星团的[Fe/H]和轨道参数。通过175个具有高质量金属量测定的开放星团获得的径向金属量梯度为$-$0.064 $\pm$ 0.007 dex kpc$^{-1}$。由开放星团描绘的径向金属量分布在R$_{\rm Gal}$=12.1 $\pm$ 1.1 kpc以外趋于平坦。 在[Fe/H]-L$_{\rm z}$图中，开放星团的斜率是$-$0.31 $\pm$ 0.02 10$^{3}$ dex km$^{-1}$ kpc$^{-1}$ s，但在 L$_{\rm z}$=2769 $\pm$ 177 km kpc s$^{-1}$ 之后变得平缓。 在本文中，我们还回顾了一些围绕开放星团研究的高优先级实际挑战，这些挑战将显著推动我们的理解超越当前的最先进水平。 最后，我们将银河系的径向金属丰度梯度形状与其他螺旋星系进行了比较。 显示英文摘要

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.