Abundance patterns of the light neutron-capture elements in very and extremely metal-poor stars
نویسندگان
چکیده
منابع مشابه
Abundance Patterns of Extremely Metal-Poor Stars
We perform hydrodynamical and nucleosynthesis calculations of core-collapse supernovae (SNe) and hypernovae (HNe) of Population (Pop) III stars. We provide new yields for the main-sequence mass of MMS = 13 − 50 M⊙ and the explosion energy of E = 1 − 40 × 10 51 ergs to apply for chemical evolution studies. Our HN yields based on the mixing-fallback model of explosions reproduce the observed abun...
متن کاملNeutron Capture Elements in s-Process-Rich, Very Metal-Poor Stars
National Astronomical Observatory, Mitaka, Tokyo, 181-8588 Japan; email: [email protected], [email protected], [email protected], [email protected] Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK; email: [email protected] Research School of Astronomy and Astrophysics, The Australian National University, Private Bag, Weston Creek Pos...
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 کاملYields of Population III Supernovae and the Abundance Patterns of Extremely Metal-Poor Stars
The abundance patterns of extremely metal-poor (EMP) stars provide us with important information on nucleosynthesis in supernovae (SNe) formed in a Pop III or EMP environment, and thus on the nature of the first stars in the Universe. We review nucleosynthesis yields of various types of those SNe, focusing on core-collapse (black-hole-forming) SNe with various progenitor masses, explosion energ...
متن کاملNucleosynthesis in Black-Hole-Forming Supernovae and Abundance Patterns of Extremely Metal-Poor Stars
Stars more massive than ∼ 20 25 M⊙ form a black hole at the end of their evolution. Stars with non-rotating black holes are likely to collapse "quietly" ejecting a small amount of heavy elements (Faint supernovae). In contrast, stars with rotating black holes are likely to give rise to very energetic supernovae (Hypernovae). We present distinct nucleosynthesis features of these two types of "bl...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2018
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201732096