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

doi:10.3847/1538-4357/ad6b13

YNAO OpenIR > 恒星物理研究组

	Formation of WNL Stars in the MW and LMC Based on the k - ω Model
	Si JJ(思霁娟)1,2,3,4 ; Li Z(李志)1,2,3,4 ; Li Y(李焱)1,2,3,4,5
发表期刊	ASTROPHYSICAL JOURNAL
	2024-10-01
卷号	974 期号:2
DOI	10.3847/1538-4357/ad6b13
产权排序	第1完成单位
收录类别	SCI
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.
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
项目资助者	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
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	0004-637X
URL	查看原文
WOS记录号	WOS:001335980900001
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	WOLF-RAYET STARS ; M-CIRCLE-DOT ; MASS-LOSS RATES ; LARGE-MAGELLANIC-CLOUD ; STELLAR EVOLUTION ; PRESUPERNOVA EVOLUTION ; CONVECTIVE BOUNDARIES ; O-STARS ; ROTATION ; MESA
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/114a53/27647
专题	恒星物理研究组中国科学院天体结构与演化重点实验室
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650216, People's Republic of China; 2.University of Chinese Academy of Sciences, Beijing 100049, 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.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, People's Republic of China; 5.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, 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	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).

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