Nucleosynthesis in early rotating massive stars and chemical composition of CEMP stars
Nucleosynthesis in early rotating massive stars and chemical composition of CEMP stars
复制标题
早期旋转大质量恒星的核合成和 CEMP 恒星的化学成分
DOI:
10.1088/1742-6596/1668/1/012006
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Choplin A
中科院分区:
文献类型:
--
作者:
Choplin A
The first massive stars triggered the onset of chemical evolution by releasing the first metals (elements heavier than helium) in the Universe. The nature of these stars and how the early chemical enrichment took place is still largely unknown. Rotational-induced mixing in the stellar interior can impact the nucleosynthesis during the stellar life of massive stars and lead to stellar ejecta having various chemical compositions. We present low and zero-metallicity 20, 25 and 40 M⊙ stellar models with various initial rotation rates and assumptions for the nuclear reactions rates. With increasing initial rotation, the yields of light (from∼ C to Al) and trans-iron elements are boosted. The trans-iron elements (especially elements heavier than Ba) are significantly affected by the nuclear reaction uncertainties. The chemical composition of the observed CEMP (carbon-enhanced metal-poor) stars CS29528-028 and HE0336+ 0113 are consistent with the chemical composition of the material ejected by a fast rotating 40 M⊙ model.
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DOI:
10.1051/0004-6361/201628083
发表时间:
2016
期刊:
arXiv: Solar and Stellar Astrophysics
影响因子:
--
作者:
A. Choplin;A. Maeder;G. Meynet;C. Chiappini
通讯作者:
C. Chiappini
DOI:
--
发表时间:
2021
期刊:
影响因子:
--
作者:
R. Hirschi
通讯作者:
R. Hirschi
影响因子:
4.4
作者:
M. Taggart;C. Akers;A. Laird;U. Hager;C. Ruiz;D. Hutcheon;M. Bentley;J. Brown;L. Buchmann;A. Chen;Jun Chen;K. Chipps;A. Choplin;J. D'auria;B. Davids;B. Davids;C. Davis;C. Diget;L. Erikson;J. Fallis;S. Fox;U. Frischknecht;B. Fulton;N. Galinski;U. Greife;R. Hirschi;D. Howell;L. Martin;D. Mountford;A. Murphy;D. Ottewell;M. Pignatari;S. Reeve;G. Ruprecht;S. Sjue;L. Veloce;M. Williams;M. Williams
通讯作者:
M. Williams
影响因子:
8.7
作者:
Limongi, Marco;Chieffi, Alessandro
通讯作者:
Chieffi, Alessandro