The G-dwarf problem and the closed-box models of Galactic evolution
1990; IOP Publishing; Volume: 361; Linguagem: Inglês
10.1086/169213
ISSN1538-4357
AutoresP. François, E. Vangioni–Flam, J. Audouze,
Tópico(s)Astronomy and Astrophysical Research
Resumoview Abstract Citations (17) References (33) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The G-Dwarf Problem and the Closed-Box Models of Galactic Evolution Francois, Patrick ; Vangioni-Flam, Elisabeth ; Audouze, Jean Abstract The paucity of very iron-poor stars in the Galactic disk with respect to the predictions of the simple model of Galactic chemical evolution (the notorious G-dwarf problem) is one of the most fundamental constraints of Galactic evolutionary models. This paper tests recently proposed models, with bimodal and varying star formation rates, against the G-dwarf metallicity distribution, the gas/total mass ratio in the solar vicinity, the 'age-metallicity' relation, and the abundances of deuterium, O-16, Mg-24, Si-28, and Fe-56 at the birth of the sun. It is shown that none of these models agree entirely with the data, but that it is possible to find a combination of the two models leading to reasonable results. Publication: The Astrophysical Journal Pub Date: October 1990 DOI: 10.1086/169213 Bibcode: 1990ApJ...361..487F Keywords: Abundance; Dwarf Stars; G Stars; Galactic Evolution; Metallicity; Star Formation; Deuterium; Giant Stars; Heavy Elements; Astrophysics; STARS: EVOLUTION; STARS: FORMATION; STARS: STELLAR STATISTICS; STARS: WEAK-LINE full text sources ADS |
Referência(s)