On the O/Fe versus Fe/H relationship and the progenitors of type I supernovae

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/169552· OSTI ID:6261426

Abia, C; Canal, R; Isern, J ^[1]

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1. Instituto de Astrofisica de Canarias, La Laguna (Spain) Institut d'Astronomie, d'Astrophysique et de Geophysique, Brussels (Belgium) Barcelona Universidad (Belgium) Societat Catalana de Fisica (Spain) Societat Catalana de Fisica, Barcelona (Spain) Blanes Centre d'Estudis Avancats (Spain)

The new observational O/Fe versus Fe/H abundance relationship for halo stars is studied in terms of several models of chemical evolution for the solar neighborhood. Nucleosynthesis products from type I (both Ia and Ib) and Type II SNs are taken into account. The behavior of the O/Fe ratio for halo and disk stars is well reproduced by assuming (1) a lower iron production in SN II than in previous theoretical prescriptions, (2) the coalescence by gravitational wave radiation of two CO white dwarfs as the scenario for type Ia supernovae, and (3) stars in the Wolf-Rayet stage as progenitors of type Ib supernovae. Nevertheless, the best agreement with the observations is obtained by adopting an IMF favoring massive star formation only at very early epochs in the life of the Galaxy. Model predictions from other plausible scenarios for the origin of type I supernovae are also discussed. 41 refs.

• OSTI ID: 6261426
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 366; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
CHEMICAL COMPOSITION
DWARF STARS
ELEMENT ABUNDANCE
ELEMENTS
ERUPTIVE VARIABLE STARS
GALAXIES
GRAVITATIONAL RADIATION
INTERSTELLAR MAGNETIC FIELDS
IRON
MAGNETIC FIELDS
MAIN SEQUENCE STARS
MATHEMATICAL MODELS
METALS
MILKY WAY
NUCLEOSYNTHESIS
ORIGIN
RADIATIONS
STAR ACCRETION
STAR EVOLUTION
STAR MODELS
STARS
SUPERNOVAE
SYNTHESIS
TRANSITION ELEMENTS
VARIABLE STARS
WHITE DWARF STARS
WOLF-RAYET STARS