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Stellar Parameters and Chemical Abundances for 20,032 Open Cluster Members from Gaia XP Spectra Using a Boosting Multihead Attention Network

  • Authors: Jingzhen Sun, Yude Bu, Jiangchuan Zhang, Mengmeng Zhang, ShanShan Li, Yuhang Zhang, Ke Wang, Zhenping Yi, Xiaoming Kong, Meng Liu, Minglei Wu

Jingzhen Sun et al 2026 The Astrophysical Journal Supplement Series 285 .

  • Provider: AAS Journals

Caption: Figure 4.

Comparison between the reference APOGEE labels (x-axis) and the model-predicted stellar parameters (y-axis) for the validation set. The panels display the results for 11 stellar labels, including atmospheric parameters (﹩\mathrm{log}g﹩, Teff, [M/H]) and individual elemental abundances. In the main panels, the color density represents the stellar number density on a logarithmic scale, highlighting both the dense core regions and the sparse outliers. The red dashed line indicates the identity relation (y = x). The dotted lines (orange, green, and purple) represent the ±1σ, ±2σ, and ±3σ dispersion intervals derived from the residuals, respectively. The top panels show the marginal probability density distributions of the ground truth (blue) and predicted values (orange), demonstrating the consistency of the global distributions.

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