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Formation of WNL Stars in the MW and LMC Based on the k - ω Model

文献类型：期刊论文

作者Si JJ(思霁娟)2,3,4,5; Li Z(李志)2,3,4,5; Li Y(李焱)1,2,3,4,5
刊名ASTROPHYSICAL JOURNAL
出版日期2024-10-01
卷号974期号:2
ISSN号0004-637X
DOI10.3847/1538-4357/ad6b13
产权排序第1完成单位
文献子类Article
英文摘要We adopt a set of second-order differential equations (k - omega model) to handle core convective overshooting in massive stars, simulate the evolution of nitrogen sequence Wolf-Rayet (WNL) stars with different metallicities and initial masses, both rotating and nonrotating models, and compare the results with the classical overshooting model. The results indicate that, under the same initial conditions, the k - omega model generally produces larger convective cores and wider overshooting regions, thereby increasing the mass ranges and extending the lifetimes of WNL stars, as well as the likelihood of forming WNL stars. The masses and lifetimes of WNL stars both increase with higher metallicities and initial masses. Under higher-metallicity conditions, the two overshooting schemes significantly differ in their impacts on the lifetimes of WNL stars, but are insignificant in the mass ranges of the WNL stars. Rotation may drive the formation of WNL stars in low-mass, metal-poor counterparts, with this effect being more pronounced in the overshooting model. The surface nitrogen of metal-rich WNL stars formed during the main-sequence phase is likely primarily from the CN cycle, while it may come from both the CN and NO cycles for relatively metal-poor counterparts. Our model can effectively explain the distribution of WNL stars in the Milky Way, but appears to have inadequacies in explaining the WNL stars in the LMC.
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WOLF-RAYET STARS ; M-CIRCLE-DOT ; MASS-LOSS RATES ; LARGE-MAGELLANIC-CLOUD ; STELLAR EVOLUTION ; PRESUPERNOVA EVOLUTION ; CONVECTIVE BOUNDARIES ; O-STARS ; ROTATION ; MESA
资助项目National Key R&D Program of China[2021YFA1600400/2021YFA1600402]; National Natural Science Foundation of China[12133011]; National Natural Science Foundation of China[12288102]; National Natural Science Foundation of China[12273104]; Natural Science Foundation of Yunnan Province[202401CF070041]; Yunnan Fundamental Research Projects[202401AS070045]; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]; China Manned Space Project[CMS-CSST-2021-B06]; Yunnan Revitalization Talent Support Program Young Talent Project
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001335980900001
出版者IOP Publishing Ltd
资助机构National Key R&D Program of China[2021YFA1600400/2021YFA1600402] ; National Natural Science Foundation of China[12133011, 12288102, 12273104] ; Natural Science Foundation of Yunnan Province[202401CF070041] ; Yunnan Fundamental Research Projects[202401AS070045] ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001] ; China Manned Space Project[CMS-CSST-2021-B06] ; Yunnan Revitalization Talent Support Program Young Talent Project
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/27647]  
专题云南天文台_恒星物理研究组
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, People's Republic of China
2.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, People's Republic of China;
3.Key Laboratory for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, People's Republic of China;
4.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China;
5.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650216, People's Republic of China;
推荐引用方式
GB/T 7714		 Si JJ,Li Z,Li Y. Formation of WNL Stars in the MW and LMC Based on the k - ω Model[J]. ASTROPHYSICAL JOURNAL,2024,974(2).
APA 思霁娟,李志,&李焱.(2024).Formation of WNL Stars in the MW and LMC Based on the k - ω Model.ASTROPHYSICAL JOURNAL,974(2).
MLA 思霁娟,et al."Formation of WNL Stars in the MW and LMC Based on the k - ω Model".ASTROPHYSICAL JOURNAL 974.2(2024).

入库方式： OAI收割

来源：云南天文台

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