标题： Gaia DR3中的冷矮星的大气参数 显示英文标题

标题： Stellar Atmospheric Parameters for Cool Dwarfs in Gaia DR3

摘要： 我们提供了来自盖亚DR3的1,806,921颗凉矮星的大气参数目录，这些凉矮星位于LAMOST凉矮星光谱参数覆盖的范围内：3200 K < T_{效率}< 4300 K，-0.8 < [M/H] < 0.2 dex，以及4.5 <log{g} < 5.5 dex。 我们的值是基于用修正尘埃后的多波段测光数据训练的机器学习模型得出的。 测光数据包括来自SDSS r、i、z波段的光学数据，来自2MASS J、H、K的近红外数据，以及来自ALLWISE W1、W2的中红外数据。 我们使用了随机森林和LightGBM两种机器学习模型，并发现两者的结果相似，对于T_{有效}、[M/H]和log {g}的误差离散度分别为68 K、0.22 dex和0.05 dex。 不同测光颜色的相对特征重要性评估显示，W1 -- W2对T_{效率}和log{g}最敏感，而J -- H对[M/H]最敏感。 我们发现我们的值与APOGEE有很好的一致性，但与作为盖亚DR3一部分提供的值显著不同。 显示英文摘要

摘要： We provide a catalogue of atmospheric parameters for 1,806,921 cool dwarfs from Gaia DR3 which lie within the range covered by LAMOST cool dwarf spectroscopic parameters: 3200 K < T_{eff}< 4300 K, -0.8 < [M/H] < 0.2 dex, and 4.5 <log{g} < 5.5 dex. Our values are derived based on Machine Learning models trained with multi-band photometry corrected for dust. The photometric data comprises of optical from SDSS r, i, z bands, near-infrared from 2MASS J, H, K and mid-infrared from ALLWISE W1, W2. We used both random forest and LightGBM machine learning models and found similar results from both with an error dispersion of 68 K, 0.22 dex, and 0.05 dex for T_{eff}, [M/H], and log {g}, respectively. Assessment of the relative feature importance of different photometric colors indicated W1 -- W2 as most sensitive to both T_{eff} and log{g}, with J -- H most sensitive to [M/H]. We find that our values show a good agreement with APOGEE, but are significantly different to those provided as part of Gaia DR3.