Mass, Luminosity, and Stellar Age of Early-type Stars from the LAMOST Survey

doi:10.3847/1538-4365/ad8fa9

YNAO OpenIR > 大样本恒星演化研究组

	Mass, Luminosity, and Stellar Age of Early-type Stars from the LAMOST Survey
	Li QD(李启达)1,2 ; Xiong JP(熊建萍)1 ; Li J(李蛟)1 ; Guo YJ(郭彦君)1 ; Han ZW(韩占文)1 ; Chen XF(陈雪飞)1,3 ; Liu, Chao 2,4
发表期刊	ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
	2025
卷号	276 期号:1
DOI	10.3847/1538-4365/ad8fa9
产权排序	第1完成单位
收录类别	SCI
摘要	Mass (M) and luminosity (L) are fundamental parameters of stars but can only be measured indirectly. Typically, effective temperature (T eff), surface gravity ( logg ), and metallicity ([M/H]) are derived from stellar spectra, then M, L, and stellar age (t) can be obtained by interpolating in the grid of stellar evolutionary models. In this paper, we use random forest in combination with the evolutionary grid from PARSEC 1.2S to determine M, L, t, and initial mass (M i) for early-type main-sequence stars (T eff >= 7000 K) as identified from the LAMOST survey. The convex hull algorithm is employed to select the main-sequence stars. The results demonstrate that the prediction precision is 32% and 9% for L and M, respectively, which is comparable to that achieved by fitting evolutionary tracks. Furthermore, the predicted L also aligns with Gaia's observations, with a relative difference of 36%. The prediction for t is relatively less accurate, indicating a difference of 0.44 Gyr for two components in wide binaries. This discrepancy is due to the inconsistent metallicity measurements. For the two sets of atmospheric parameters we used, the relative differences in L, M, t, and M i are 29%, 7%, 36%, and 7%, respectively. The influence of metallicity on these parameters is analyzed, with the conclusion that metallicity has the greatest impact on t. Consequently, two catalogs are presented, which could be useful for studying stellar populations such as the luminosity function and initial mass function of early-type stars.
资助项目	MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12288102]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12125303]; MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12090040/3]; National Natural Science Foundation of China[2021YFA1600401]; National Natural Science Foundation of China[2021YFA1600403]; National Natural Science Foundation of China[2021YFA1600400]; National Key R&D Program of China[202201BC070003]; National Key R&D Program of China[202001AW070007]; Natural Science Foundation of Yunnan Province[202302AN360001]; Natural Science Foundation of Yunnan Province[202305AB350003]; International Centre of Supernovae, Yunnan Key Laboratory[CMS-CSST-2021-A10]; China Manned Space Project[12303106]; NFSC[GZC20232976]; Postdoctoral Fellowship Program of CPSF
项目资助者	MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[12288102, 12125303, 12090040/3] ; National Natural Science Foundation of China[2021YFA1600401, 2021YFA1600403, 2021YFA1600400] ; National Key R&D Program of China[202201BC070003, 202001AW070007] ; Natural Science Foundation of Yunnan Province[202302AN360001, 202305AB350003] ; International Centre of Supernovae, Yunnan Key Laboratory[CMS-CSST-2021-A10] ; China Manned Space Project[12303106] ; NFSC[GZC20232976] ; Postdoctoral Fellowship Program of CPSF
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	0067-0049
URL	查看原文
WOS记录号	WOS:001390635300001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	EFFECTIVE TEMPERATURES ; EVOLUTIONARY TRACKS ; PARAMETERS ; METALLICITY ; ISOCHRONES ; ABUNDANCES ; SUPERNOVAE ; BINARIES ; MILKY ; CATALOG
引用统计
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/27962
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, People's Republic of China; [email protected]; 2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China; 3.International Centre of Supernovae, Yunnan Key Laboratory, Kunming, 650216, People's Republic of China; 4.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of 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	Li QD,Xiong JP,Li J,et al. Mass, Luminosity, and Stellar Age of Early-type Stars from the LAMOST Survey[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2025,276(1).
APA	李启达.,熊建萍.,李蛟.,郭彦君.,韩占文.,...&Liu, Chao.(2025).Mass, Luminosity, and Stellar Age of Early-type Stars from the LAMOST Survey.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,276(1).
MLA	李启达,et al."Mass, Luminosity, and Stellar Age of Early-type Stars from the LAMOST Survey".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 276.1(2025).

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