Super and massive AGB stars – III. Nucleosynthesis in metal-poor and very metal-poor stars – Z = 0.001 and 0.0001
نویسندگان
چکیده
منابع مشابه
Nucleosynthesis in metal-poor AGB stars
We present detailed abundance results concerning CEMP (Carbon Enhanced Metal-Poor) stars and the various subclasses. Statistical arguments from radial velocity monitoring show that these stars are all binaries and have mass transferred from a former AGB. Therefore these stars are the direct witnesses of the nucleosynthesis production of the first low and intermediate mass stars. To put CEMP sta...
متن کاملSupernova Nucleosynthesis and Extremely Metal-Poor Stars
We investigate hydrodynamical and nucleosynthetic properties of the jet-induced explosion of a population III 40M⊙ star and compare the abundance patterns of the yields with those of the metal-poor stars. We conclude that (1) the ejection of Fe-peak products and the fallback of unprocessed materials can account for the abundance patterns of the extremely metal-poor (EMP) stars and that (2) the ...
متن کاملPop III Hypernova Nucleosynthesis and Abundances in Very Metal-Poor Halo Stars
We calculate evolution and nucleosynthesis in massive Pop III stars with M = 13 ∼ 270M⊙, and compare the results with abundances of very metal-poor halo stars. The observed abundances can be explained by the energetic core-collapse supernovae with M ∼ < 130M⊙ (“hypernovae”) but not by pair-instability supernovae (PISNe) with M ∼ 140 − 270M⊙. This result constrain the IMF for the Pop III and ver...
متن کاملSulphur abundance in very metal-poor stars
We have obtained high-resolution high signal-to-noise spectra of the S i nearinfrared doublet at 8694 Å in eight metal-poor stars with metallicities in the range −0.6 ≤[Fe/H]≤ −3.0. Elemental sulphur abundances were derived for six targets and upper limits were set for two of the most metal-poor stars in the sample. The sulphur doublet at 8694.62 Å has been detected in three stars (HD19445, HD2...
متن کاملAbundances in Very Metal-Poor Stars
Metal-poor stars provide information on the characteristics and chemical evolution of the halo population of the Galaxy, the first epoch of star formation and Galaxy formation (not just locally but with relevance to high-redshift objects), and big bang nucleosynthesis. This review looks at recent developments in this subject.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2014
ISSN: 1365-2966,0035-8711
DOI: 10.1093/mnras/stu571