XGboost for Predicting Chemical Abundances of Open Clusters in LAMOST DR11 LRS

doi:10.1088/1674-4527/adba29

YNAO OpenIR > 大样本恒星演化研究组

	XGboost for Predicting Chemical Abundances of Open Clusters in LAMOST DR11 LRS
	Zhang RY(张汝媛)1 ; Chen, Jianxing 2; Wu CY(吴程远)1 ; Wang LQ(王璐茜)1 ; Cha S(查帅)1 ; Guo SF(郭素芬)1,3 ; Han ZW(韩占文)1
发表期刊	RESEARCH IN ASTRONOMY AND ASTROPHYSICS (IF:1.227[JCR-2017],1.449[5-Year])
	2025-03-01
卷号	25 期号:3
DOI	10.1088/1674-4527/adba29
产权排序	第1完成单位
收录类别	SCI
关键词	stars: abundances stars: atmospheres Galaxy: abundances Galaxy: disk (Galaxy:) open clusters and associations: general
摘要	The 11th data release of the LAMOST survey provides fundamental stellar parameters but lacks detailed abundance measurements for alpha-elements, which are crucial for understanding stellar populations and Galactic chemical evolution. In this study, we derive the abundances of oxygen (O), magnesium (Mg), silicon (Si), calcium (Ca), and titanium (Ti) for over 6.8 million stars using LAMOST DR11 low-resolution spectra. To ensure reliable measurements, we select 760 open clusters spanning a broad range of ages and apply Monte Carlo sampling for accurate abundance estimates. Additionally, we utilize over 30,000 stars from the GALAH DR4 catalog to train an XGBoost model for extracting alpha-element abundances from LAMOST DR11 spectra. Bayesian linear regression is employed to analyze the compositional distribution across the Galactic disk and infer chemical gradients as a function of Galactocentric distance. Our results indicate a general increase in chemical abundances with Galactocentric distance, with oxygen showing the steepest gradient. Our results confirm the overall increase of alpha-element abundances with Galactocentric distance, consistent with previous studies, while minor discrepancies in Mg, Ca, and Ti gradients likely arise from differences in sample selection, observational sensitivity, or Galactic enrichment processes.
资助项目	National Natural Science Foundation of China[12090040]; National Natural Science Foundation of China[12090043]; National Natural Science Foundation of China[12473031]; National Natural Science Foundation of China[12003025]; Basic Research Program of Yunnan Province[202401AT070142]; International Center of Supernovae, Yunnan Key Laboratory[202302AN360001]; Natural Science Foundation of Yunnan Province[202201BC070003]; Postdoctoral Fellowship Program of CPSF[GZC20240124]; Postdoctoral Fellowship Program of CPSF[2024M760242]
项目资助者	National Natural Science Foundation of China[12090040, 12090043, 12473031, 12003025] ; Basic Research Program of Yunnan Province[202401AT070142] ; International Center of Supernovae, Yunnan Key Laboratory[202302AN360001] ; Natural Science Foundation of Yunnan Province[202201BC070003] ; Postdoctoral Fellowship Program of CPSF[GZC20240124, 2024M760242]
语种	英语
学科领域	天文学 ; 恒星与银河系
文章类型	Article
出版者	IOP Publishing Ltd
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN	1674-4527
URL	查看原文
WOS记录号	WOS:001451116900001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	GALACTIC DISK ; METALLICITY GRADIENTS ; STELLAR PARAMETERS ; EVOLUTION ; ELEMENTS ; STARS ; MILKY ; GAIA ; POPULATION ; PRECISION
引用统计	正在获取...
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/28233
专题	大样本恒星演化研究组
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China; 2.School of Physics and Astronomy, Beijing Normal University, Beijing 100875, China; 3.School of Physical Science and Technology, Xinjiang University, Urumqi 830046, China
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Zhang RY,Chen, Jianxing,Wu CY,et al. XGboost for Predicting Chemical Abundances of Open Clusters in LAMOST DR11 LRS[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2025,25(3).
APA	张汝媛.,Chen, Jianxing.,吴程远.,王璐茜.,查帅.,...&韩占文.(2025).XGboost for Predicting Chemical Abundances of Open Clusters in LAMOST DR11 LRS.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,25(3).
MLA	张汝媛,et al."XGboost for Predicting Chemical Abundances of Open Clusters in LAMOST DR11 LRS".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 25.3(2025).

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