Astronomy and Astrophysics – Astronomy
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.226..395r&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 226, May 15, 1987, p. 395-422. Research supported by th
Astronomy and Astrophysics
Astronomy
9
Chemical Evolution, Dark Matter, Galactic Evolution, Metallicity, Chemical Fractionation, Density Distribution, Dwarf Stars, Hydrogen, Radial Distribution, Solar Neighborhood, Star Formation, Star Formation Rate
Scientific paper
Some aspects of the authors' model of the chemical evolution of the Galaxy are investigated in detail. It is found that a constant yield of metals is more appropriate than their previous assumption of a yield proportional to metallicity. Possible time variations of the returned fraction, the dark matter fraction and the star formation rate are also studied. The predicted distribution of molecular hydrogen from the star formation rates is revised. For consistency, dark matter is required to be present in the solar neighbourhood, its fraction to the total surface density of matter being in the region 0.3 - 0.6. The authors suggest that dark matter in the solar neighbourhood could be totally baryonic provided the Miller-Scalo initial mass function is modified either at the lower or higher end of the mass limits.
Rana Narayan C.
Wilkinson D. A.
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