Solar neighbourhood constraints on viscous models for galactic discs

Details Solar neighbourhood constraints on viscous models for galactic discs Solar neighbourhood constraints on viscous models for galactic discs

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.249..704c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 249, April 15, 1991, p. 704-706.

Astronomy and Astrophysics

Astronomy

13

Astronomical Models, Disk Galaxies, Galactic Evolution, Solar Neighborhood, Viscosity, Abundance, Chemical Evolution, G Stars, Galactic Structure, Halos

Scientific paper

Predictions of disk evolution models with viscous flows for the chemical enrichment of the solar neighborhood are examined. It is shown that the local age metallicity distribution and stellar abundance distribution is in this case critically determined by the star formation history at large radii. In particular, suppression of star formation in the outermost disk combined with radial flow leads to an input of low-metallicity gas into the solar neighborhood, with consequences indistinguishable from those of continued infall from the halo. It is argued that the chemical data do not necessarily constrain the disk formation time scale.

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