Chemical evolution of viscously evolving galactic discs

We investigate the ability of the Lin–Pringle model of galactic disc formation to reproduce the observed radial distributions of total gas surface density and metals in disc galaxies. We find that a satisfactory fit is obtained provided only that there exists an outer cut-off to the star-forming dis...

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Veröffentlicht in:	Monthly notices of the Royal Astronomical Society 1989-05, Vol.238 (2), p.283-292
1. Verfasser:	Clarke, Catherine J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy Astrophysics Earth, ocean, space Exact sciences and technology Interstellar medium (ism) and nebulae in external galaxies Stellar systems. Galactic and extragalactic objects and systems. The universe
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Beschreibung
Zusammenfassung:	We investigate the ability of the Lin–Pringle model of galactic disc formation to reproduce the observed radial distributions of total gas surface density and metals in disc galaxies. We find that a satisfactory fit is obtained provided only that there exists an outer cut-off to the star-forming disc beyond which gas is allowed to viscously evolve. The metallicity gradient is then established by radial inflow of gas from beyond this cut-off.
ISSN:	0035-8711 1365-2966
DOI:	10.1093/mnras/238.2.283