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

文献类型：期刊论文

作者Zhang RY(张汝媛)3; Chen, Jianxing2; Wu CY(吴程远)3; Wang LQ(王璐茜)3; Cha S(查帅)3; Guo SF(郭素芬)1,3; Han ZW(韩占文)3
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2025-03-01
卷号25期号:3
关键词stars: abundances stars: atmospheres Galaxy: abundances Galaxy: disk (Galaxy:) open clusters and associations: general
ISSN号1674-4527
DOI10.1088/1674-4527/adba29
产权排序第1完成单位
文献子类Article
英文摘要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.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词GALACTIC DISK ; METALLICITY GRADIENTS ; STELLAR PARAMETERS ; EVOLUTION ; ELEMENTS ; STARS ; MILKY ; GAIA ; POPULATION ; PRECISION
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]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001451116900001
出版者IOP Publishing Ltd
资助机构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]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28233]  
专题云南天文台_大样本恒星演化研究组
作者单位1.School of Physical Science and Technology, Xinjiang University, Urumqi 830046, China
2.School of Physics and Astronomy, Beijing Normal University, Beijing 100875, China;
3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China;
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).

入库方式： OAI收割

来源：云南天文台

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