Dynamical and chemical evolution of viscous, star-forming galactic discs

Details Dynamical and chemical evolution of viscous, star-forming galactic discs Dynamical and chemical evolution of viscous, star-forming galactic discs

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.255..650h&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 255, April 15, 1992, p. 650-654.

Astronomy and Astrophysics

Astrophysics

3

Accretion Disks, Cooling Flows (Astrophysics), Disk Galaxies, Star Formation, Viscous Flow, Astronomical Models, Gas Density, Interstellar Gas, Metallicity, Milky Way Galaxy

Scientific paper

Models of the formation and subsequent viscous evolution of galactic disks are examined. The disks are assumed to form as described by the cooling flow solutions of Sommer-Larsen; the star formation rate is assumed to be given by the prescription of Wyse and Silk. The resulting stellar and gas profiles are found to resemble well the observed profiles of disk galaxies. Gradients in gas and star metallicities are also calculated. Values around -0.05 dex/kpc are obtained for the gas metallicity, in fine agreement with the observed O/H gradient in the Galaxy. The exact magnitude of these gradients depends only weakly on the model parameters.

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