Evolution of Fe, r, and S elements in our Galaxy
1988; IOP Publishing; Volume: 334; Linguagem: Inglês
10.1086/166871
ISSN1538-4357
AutoresP. Andreani, E. Vangioni–Flam, J. Audouze,
Tópico(s)Astronomical and nuclear sciences
Resumoview Abstract Citations (21) References (42) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Evolution of Fe, r, and S Elements in Our Galaxy Andreani, Paola ; Vangioni-Flam, Elisabeth ; Audouze, Jean Abstract Constraints are set up here on the first generations of disk stars by taking advantage of the sensitivity of Fe, r, and s abundances against the star formation rate for stars of different masses. A time-varying SFR and a bimodal SFR which differ in their predicted proportion of massive stars at early epochs are considered. The analysis reported here clearly favors time-varying SFR models which account satisfactorily for both the r and s abundance similarity in the solar system and the overall metallicity such as the sharp rise of the r-process nuclei relative to the s-process nuclei. The evolution of the Th/Nd ratio is also considered. Publication: The Astrophysical Journal Pub Date: November 1988 DOI: 10.1086/166871 Bibcode: 1988ApJ...334..698A Keywords: Chemical Evolution; Galactic Evolution; Milky Way Galaxy; Nuclear Astrophysics; Star Formation Rate; Hubble Constant; Iron; Neodymium; Nuclear Fusion; Stellar Composition; Thorium; Astrophysics; NUCLEOSYNTHESIS; STARS: ABUNDANCES; STARS: EVOLUTION; STARS: FORMATION full text sources ADS |
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