Figure 3.
![The distribution of the overall reference dataset in the $T_{\rm eff} \!-\! \rm [Fe/H]$ space. In this paper, the samples are divided into reference set 1 (S1), reference set 2 (S2), and reference set 3 (S3) according to their distribution characteristics in the parameter space: S1 = A2, S2 = A1∪A3∪A4∪A6, and S3 = A4∪A5∪A6.](https://oup.silverchair-cdn.com/oup/backfile/Content_public/Journal/mnras/523/4/10.1093_mnras_stad1778/1/stad1778fig3.jpeg?Expires=1749317440&Signature=LJLun8ZJioc0PUmCIzwWBB4oDuoDQmAX5FUBEAYpLr3WZJ1ZLZR7Ov~CBx31PVIjjM1kWKDiMN1d8KlwgCYBdQNthVkKZ9~3Mf8rmdakaS97DLattZv~QM51Dv5YK9jsQM7juXCdYKiLnCvsbR7L2rnkFF-tn4mR59m1lBT9EBhS87dZReailrdvPQnVwYuWShRWTLft0X1-22s-ebZH0IosNsnTLwshsjhHBu5WkYfKuwLv-Y0hgombD6IilFhJXLAX-PV82yJAK3Ih-SBjfpvApJb19Oiwyyl4jnDTAXIwacfjIkWYuwCmU5C~U1noW2frzP-iZZM5D0Aa9BKY~g__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
The distribution of the overall reference dataset in the |$T_{\rm eff} \!-\! \rm [Fe/H]$| space. In this paper, the samples are divided into reference set 1 (S1), reference set 2 (S2), and reference set 3 (S3) according to their distribution characteristics in the parameter space: S1 = A2, S2 = A1∪A3∪A4∪A6, and S3 = A4∪A5∪A6.
