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

文献类型：期刊论文

作者Li QD(李启达)1,2; Xiong JP(熊建萍)2; Li J(李蛟)2; Guo YJ(郭彦君)2; Han ZW(韩占文)2; Chen XF(陈雪飞)2,4; Liu, Chao1,3
刊名ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
出版日期2025
卷号276期号:1
ISSN号0067-0049
DOI10.3847/1538-4365/ad8fa9
产权排序第1完成单位
文献子类Article
英文摘要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.
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EFFECTIVE TEMPERATURES ; EVOLUTIONARY TRACKS ; PARAMETERS ; METALLICITY ; ISOCHRONES ; ABUNDANCES ; SUPERNOVAE ; BINARIES ; MILKY ; CATALOG
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
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001390635300001
出版者IOP Publishing Ltd
资助机构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
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/27962]  
专题云南天文台_大样本恒星演化研究组
作者单位1.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China;
2.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650216, People's Republic of China; cxf@ynao.ac.cn;
3.Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
4.International Centre of Supernovae, Yunnan Key Laboratory, Kunming, 650216, People's Republic of China;
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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