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The Impact of 12C(α, γ)16O Reaction on the Evolution of He Stars

文献类型：期刊论文

作者Long G(龙刚)1,2,3; Wang Y(王宇)1,2,3; Liu DD(刘栋栋)1,2,3; Wang JG(王建国)1,2,3; Wang B(王博)1,2,3
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2026-01-30
卷号26期号:1
关键词stars: massive stars: evolution stars: abundances stars: black holes
ISSN号1674-4527
DOI10.1088/1674-4527/ae2104
产权排序第1完成单位
文献子类Article
英文摘要The C-12(alpha, gamma)O-16 reaction is one of the most important reactions in the evolution of massive stars, yet its rate is still highly uncertain. In this work, we investigated how variations in the C-12(alpha, gamma)O-16 reaction rate affect the evolution of a 14 M-circle dot He star using the MESA code. Our simulations indicate that the C-12(alpha, gamma)O-16 reaction rate determines the conditions for C burning, affecting its explodability. As the reaction rate increases, central C-burning becomes neutrino-dominated, transitioning from the convective to the radiative regime. This leads to higher compactness and a larger iron core, indicating a more compact pre-supernova (pre-SN) core structure that is difficult to explode. Conversely, lower reaction rates shorten the C-burning lifetime and trigger earlier central Ne ignition, which counteracts core contraction. This results in reduced compactness and iron core mass. We also found that variations in reaction rates shift the location of the last C-burning shell. When this shell exceeds the mass coordinate used for compactness evaluation, the overall compactness increases significantly. Although the Si- and O-burning convective shells decrease compactness, the overall increase remains unaffected. This work suggests that the C-12(alpha, gamma)O-16 reaction plays an important role in the pre-SN core structure and potentially impacts the explodability of massive He stars.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND
WOS关键词BLACK-HOLE FORMATION ; CORE-COLLAPSE SUPERNOVAE ; MASSIVE STARS ; PRESUPERNOVA EVOLUTION ; CONVECTIVE BOUNDARIES ; HELIUM STARS ; NUCLEOSYNTHESIS ; EXPLOSION ; MODULES ; UNCERTAINTIES
资助项目National Natural Science Foundation of China[12288102]; National Natural Science Foundation of China[12225304]; National Natural Science Foundation of China[12090040/12090043]; National Natural Science Foundation of China[12273105]; National Key R&D Program of China[2021YFA1600404]; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2021058]; Yunnan Revitalization Talent Support Program (Yunling Scholar Project); Yunnan Fundamental Research Project[202201BC070003]; Yunnan Fundamental Research Project[202401AV070006]; Yunnan Fundamental Research Project[202201AW070011]; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001638625600001
出版者IOP Publishing Ltd
资助机构National Natural Science Foundation of China[12288102, 12225304, 12090040/12090043, 12273105] ; National Key R&D Program of China[2021YFA1600404] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2021058] ; Yunnan Revitalization Talent Support Program (Yunling Scholar Project) ; Yunnan Fundamental Research Project[202201BC070003, 202401AV070006, 202201AW070011] ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28798]  
专题云南天文台_丽江天文观测站（南方基地）
通讯作者Liu DD(刘栋栋)
作者单位1.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, China
2.University of Chinese Academy of Sciences, Beijing 100049, China;
3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China; liudongdong@ynao.ac.cn, wangjg@ynao.ac.cn, wangbo@ynao.ac.cn;
推荐引用方式
GB/T 7714		 Long G,Wang Y,Liu DD,et al. The Impact of 12C(α, γ)16O Reaction on the Evolution of He Stars[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2026,26(1).
APA 龙刚,王宇,刘栋栋,王建国,&王博.(2026).The Impact of 12C(α, γ)16O Reaction on the Evolution of He Stars.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,26(1).
MLA 龙刚,et al."The Impact of 12C(α, γ)16O Reaction on the Evolution of He Stars".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 26.1(2026).

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来源：云南天文台

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